V60 Counterweight

The driving axis counterweight to customize the BlueBrixx V60 in 8W. Currently a WIP.

This is can be used with [the 0-4-8-12 thin rods](https://www.thingiverse.com/thing:5958222)...

Some extra pins, axles and gears are necessary for it to function properly. See both pictures.

A quick "guide" to modify the set. The steps are those from the BlueBrixx instructions.
* Steps 4--5: add bevel gears, 3L axle and straight 2L connector to match the 2nd photo. It can be finicky. One could consider replacing the second from top 4x4 technic brick, open center with two 1x4 technic bricks.
* Steps 6,11: do not put the 6 pins 1/2 nor the assembly with the two brackets, tile modified and round tile. They are to be replaced with an axle with pin without friction (I only had tan ones) and the counterweight.
* Steps 12--15: replace the pins without friction with pins 3/4 and the beams with the 0-4-8-12 rod (see the first photo).
* Step 29, 42: the plates 1x10 and 1x6 are not held bit the br