My board is running good, for 3.0grams and 4.0grams figures. You can see the motor assembly and explanations here :
http://www.miniaturefootball.com/for...=14003&page=20
you can also see another test run here (even if the athlete stills not reliable -I still a beginner tweaker- it gives a good idea of the speed and smoothness of the board) :
http://www.miniaturefootball.com/for...ad.php?t=16222
THe simplier, the better
and light weight counterweight allows my board to run quite smooth (even on 3.0g or less) and not too loud (for a fiberboard speaking...). THe light weight counterweight make the board switch off faster too (you can see it on the vids also).
the board is actually running with only one motor.
good luck !