Yes, those washers are to allow me to tighten the bolts without twisting the rubber up. Cheers for the compliments I can actually turn the lifter speed up, but I don't want to damage it. I might try it if it's lacking in power. Your machine is really cool too - I hope it helps with it being invertible. Can't wait to see everyone's machines up close. It's really hard to see details on the YouTube videos like the robochallenge fights.