Hehe nice to see a cybermaster topic^^
Yeah i made an account on this opportunity because this is my favorite set :)
I bought 5 complete (used) sets of these and some additional main units. half of them have a broken motors, almost all of them have range issues (max. 1m... ,yes i have the software working on an old win95 PC).
Only 1 works somehow (about 2m range...), but i intend to make internal changes with a new circuit board and new motors (let's see if i have time for that next year...).