Paul B Technic

8455 was the only Technic set I purchased for about 10 years, I still miss it. This is a great redesign of it.

Very nicely done.

The versatile LEGO Technic 42121 B Model gets a forestry upgrade! I’ve transformed it into a Forest Skidder, perfect for hauling logs and tackling rugged terrain in style. From Tracks to Wheels The original B Model came with tracks, but I wanted more maneuverability and speed. I swapped them out for wheels, which meant removing one gear from the front axle to allow proper steering clearance. The end result is a smoother, more responsive machine that still looks rugged and ready for action. Body Tweaks Alongside the wheel conversion, I made a few changes to the bodywork. Some panels and beams were adjusted to better fit the new wheel setup, giving the Skidder a cleaner and more proportionate look while still keeping that tough, industrial feel. New Rear Grabber The biggest change is at the back—gone is the standard rear bucket. In its place is a functional grabber claw, powered by a small linear actuator (LA). The claw can open and close with precision, making it ideal for lifting and moving logs or other cargo. Added Tow Point No forestry vehicle is complete without towing capability! I added a rear tow point so it can easily pull my Wheeled Sorter MOC or any of my other custom trailers and attachments. This turns the Skidder into a truly multifunctional workhorse. Final Thoughts This mod takes the already fun 42121 B Model and gives it a whole new purpose. The wheel conversion improves playability, the grabber claw adds more functionality, and the tow point extends its usefulness beyond just forestry work. https://paulbtechnic.blogspot.com/2025/08/lego-technic-42121-b-model-mod-forest.html

This is very impressive.

That is very cool.

This build takes inspiration from the Snow Plow C Model of LEGO Technic set 42203, but with a fresh and functional twist — transforming it into a fully operational Rubbish Loader Body. From Snow Plow to Street Service While the original C Model is great fun, I wanted something more urban-service themed. The result is this rubbish loader body, designed to mount onto the 42203 truck chassis with minimal changes. Key Features Rear Claw Bin Lifter At the back, a compact but sturdy claw mechanism allows the loading of a rubbish bin into the truck. The claw arms swing up smoothly, making it easy to simulate real-world bin collection. Tip-and-Empty Action The entire rear tray body lifts up, and as it does, the rear door automatically opens to allow the rubbish load to empty out — just like the real thing at a landfill tip. Quick-Release Mounting The body is connected to the chassis using only two pins, making it quick and easy to remove or swap with other attachments. Modular Play Possibilities Because the body is detachable, this mod opens the door for more interchangeable service vehicle bodies — from tippers to water tanks — all based on the same robust 42203 C Model frame. This mod keeps the compact size and charm of the original C Model, but adds new play value and realism for LEGO Technic fans who enjoy municipal service vehicles. https://paulbtechnic.blogspot.com/2025/08/lego-technic-42203-c-model-mod-rubbish.html

This is very cool, I am tempted to get a second copy of 42213, just to build this.

Very nicely done :)

That is very cool. Great design and features.

This be of interest, a great C Model. https://paulbtechnic.blogspot.com/2025/08/review-lego-technic-42203-c-model-snow.html

This is very cool.

These reviews are a worry... https://www.lego.com/en-au/product/volvo-ec500-hybrid-excavator-42215

I do like it, I just think asking $10 for the instructions is a bit "much". I just had a quick look at other C models on Rebrickable that are around the same piece count. Some are free and a most are between $4 and $6. As an example: $12 - https://rebrickable.com/mocs/MOC-191632/erictrax/42177-unimog-u423/#details $14 - https://rebrickable.com/mocs/MOC-192353/M_longer/42177-unimog-437-snow-plow/#details If you were charging $5, I would have already purchased your instructions.

My comment was on the price of the instructions, not the quality of the C model.

This looks like a decent build but for $10, I was expecting something "more" than a rehash of the A model.

Another day, another machine! I’m excited to share my latest custom LEGO Technic build — the Wheeled Separator — a compact, functional, and fun model designed to mimic real-world sorting equipment, but in a smaller Technic scale. 💡 Inspiration and Concept The inspiration for this MOC came from the B-model of LEGO Technic Set 42055 - Bucket Wheel Excavator, which included a fantastic sorting mechanism for mining operations. I’ve always loved the idea of machines that do something, and I wanted to bring that concept into a smaller, more modular form. The result is this mini-sized separator system that fits right into my growing ecosystem of LEGO construction equipment. ⚙️ How It Works This Wheeled Separator is built around a functional sorting system using conveyor belts and gravity: Loading Hopper: Parts are loaded in at the rear hopper. Conveyor Belt System: These carry the pieces forward through the sorting frame. Separation Mechanism: Smaller parts fall through the gap in the middle section and are diverted to a side output chute, while larger parts continue along to the bottom conveyor belt and exit via the yellow front ramp. It’s simple, visual, and surprisingly fun to operate — just like the big machines! 🔄 Modular Integration ✅ Material Handler Compatible: It’s specifically designed to work in tandem with LEGO Technic 42144 – Material Handler. The Material Handler can easily load parts into the hopper, creating an engaging and realistic play sequence. ✅ Towable by 42209: Thanks to its compact wheeled base, the Separator can also be towed behind LEGO Technic 42209 – Volvo L120H or my modified versions of it, making it a great addition to mobile work sites. 📐 Design Highlights Compact but detailed frame using mostly Liftarms and Technic panels Realistic conveyor belt motion (manual or motorisable) Easy part flow demonstration using LEGO pieces of varying sizes Black and grey colour scheme with functional yellow accents for realism This build represents my ongoing interest in creating modular, playable Technic machinery that both looks the part and "does something" — and this Wheeled Separator does just that. Video - https://paulbtechnic.blogspot.com/2025/08/moc-lego-technic-wheeled-separator.html

I wonder if TLG will see how poorly this has been received and take it in to account for future sets? It is the first time I can recall seeing a set that has been so negative...

This is awesome.

Review of the B Model. https://paulbtechnic.blogspot.com/2025/08/review-lego-technic-42121-b-model.html

Wow, that is a very cool build.

Review - LEGO Technic 42213 - Ford Bronco SUV https://paulbtechnic.blogspot.com/2025/08/review-lego-technic-42213-ford-bronco.html

Thank you for the feedback, I am going to redesign this.

That review said what i think a lot of people also think, it simply stinks.

A totally new storage and display setup for me :) https:/paulbtechnic.blogspot.com/2025/07/a-new-era-for-my-lego-technic.html

The motorised coupler is an interesting idea, but I feel rerouting it makes more sense.