i am trying to decide on ghx 50 f/d or gx35 shift kit, I like the sk more, just seems really versatile.He says the new 16.07 to 1 gearbox os really quiet ?? How is yours ?? Lrjerry says he does not use the chain tensioners and has had no trouble at all, he uses the rear mount as an adjustment mechanism, sounds like a good idea, less wear, less noise I would think......Thanks.