Originally Posted by
erchn
You really shouldn't need to use a reamer on the arms, if the pin spins freely in an u mounted arm. Mount it all up as square as you can and give the arm a good whack or two with a nut driver. It'll align the blocks and things should move freely.
The manual directly specifies to use a reamer.
The arm must move freely on the pin (as does the uprights/c-hubs), it is NOT the pin that should move freely in the plastic hinge pin holders.
I would definitely NOT give anything a whack or two with a screwdriver to get it to operate smoothly.