Tadej

Actually I have seen it in many shops here in my country, one evan had it on sale for less than 100 eur.

I agree the Electric RC Race Buggy Motor has the most mechanical power, it also has far better cooling than the XL or NXT motor and it has the smallest weight out of all three. So if you are looking for the strongest lego motor the RC motor wins hands down. If you calculate the mechanical power to weight ratio, you can see that the RC motor is far ahead of the newer XL and NXT motors. RC motor ... 4.33W/100g XL motor ... 3.20W/100g NXT motor ... 2.54W/100g

That is not true, have you ever opened a PF battery box, it has a circuit breaker that limits the output current to 800mA. So if you try to connect more than two XL motors directly to the battery box it will not provide enough current to power the motors. As a solution to this problem you can bridge the circuit breaker with a piece of wire, that is what I did when my bulldozer was going slow due to the lack of power and after that it ran like new.

I really want to get the set 8421 and have been looking for it for a while now. It would be nice if the seller was from Europe so the shipping wouldn`t be too expensive.

Very nice idea, this just goes to show you how versatile lego is

It looks awesome and everything, but I don`t think that technic bricks give enough rigidity for such big models.

8043 if you are looking for a great model, 8258 if you are looking for a good model with a nice selection of bricks for MOCs The 8110 can wait, but the other two will get expensive as soon as they stop selling them.

Great idea and really well executed, but have you considered also doing a two digit display that counts to 99, that probably wouldn`t be hard to make since you have the basic principle figured out.

For faster spinning gears I prefer silicone spray and for slower spinning gears silicone grease.

And what is wrong with LEGO's solution ?

No it doesn't exist, but you can build it with other technic parts, that is the whole point of lego.

It's a real masterpiece

The MOC is nice, but did you really have to bend the links

LOL Solex has virtually no exhaust, I have one from 1952 and it uses 1.5 lt/100km, thats 156 miles/gallon. If it was made in USA, then there might be a problem with exhaust fumes up your nose, since fuel economy is unknown to Americans.