Hi, I've been upgrading my Ver. 1 MT using the upgrade kit and noticed a few things. First it didn't come with the bag of screws so I had to improvise using my stock-of-junk rc leftover parts. Second, after upgrading the diff gears/pins/casing, the differential is not as smooth now as before with the original gear. It feels kind of notchy when you turn the wheels. This is after grease has been applied. Do you have similar experience? Will this affect go away after a few runs to break in the gears? By the way, this is a completely new MT + upgrade kit. Thanks!