I should do a little introduction as it's my first post. At first I should say please forgive me if my English isn't great, as I'm dutch. I just got back into Lego. The last model I got was in 1992, and now I just bought the 8043 and I'm a Lego addict all over again. With everything online nowadays, it's amazing to see what's possible and how many people, also adults like me, are Lego fanatics. I always like to modify/customize things and discovered bricklink, so I have a lot of parts on the way. I've been reading here a lot already and decided to join the forum as you all seem like great creative people and maybe I can share some creations myself. I will fill my brickshelf soon with some pictures. I also have to check the attic for some ancient Technic sets..
About this discussion:
For a Lego model, I think I prefer the original 8043. It's not a real digging machine, it's a Lego model which simulates the movement of an excavator. And I think they have done the best job ever. Just 4 motors to control all the functions and still keep it fully remote controlled is amazing. That's Lego Technic at it's best if you'd ask me. Also the B model is great!! I'd say good enough to buy a second..
But I agree the Ultimate 8043 seems much more playing fun and I will definatly try to build it in the future.
About precision, I think the LA's are perfect for a model like this. Air valves in machinery in real life are normally only used for fully open or closed, or set to a prefered distance, and precision valves would be too expensive and large. For an electric scale model, that is not a 'real' digging machine I think the LA's are perfect. The way the LA's work is very much like the way CNC Machine centres are driven, with very high precision.
I also have the pneumatic truck from 1992 and I was really dissapointed with the way it operated. Again I think air pneumatics are just for a movement of a static distance. Like opening a door or pushing a product from a conveyor belt. I hope the new pneumatics are better for the people who are going to buy the new 2011 summer model. If the 8043 was pneumatic, I would not have bought it because of the lack of control with the pneumatic truck.
Maybe one day we will get oil valves.. maybe with water in them instead of oil to avoid the mess. But again I don't really need it, I think they've already done a great job with the LA's. A big improvement to Technic.