Building my 419
Did you guys have this issue the arms were a little tight and the suspension arms were no falling on their on weight ... Couple of things I noticed the shims provided were not exactly the correct thickness they were off (thicker) by as much as .07 to .03
My solution was I got a 1000 grit to take off material and 2000 grit sand paper to polish the shims and finally got to the correct thickness the arms are now free falling by its own weight