Originally Posted by Hi-LowBrow

thanks for the info.I just got mine and have been building it these 2days little by little. I followed the manual for building the drivetrain section,but
after finished to build this section, the drivetrain wasn't smooth at all.and then I spent several hours to get smoother drivetrain , so far, the problem is still there, can't solve it.
the problem is like this.....

when I spin the main drive shaft by my finger (without motor),my finger feels like the gear teeth just like the gear mesh too tight. but actually there is a liitle amout of Play on the gear mesh between the bevel gear and the one way's gear.
anyone has had the same problem ???