I decided to install the seats so that I could climb in see how things felt. It was hard to determine if the rudder pedals were friction-free enough by using just my hands. After climbing in, my feet confirmed that they feel pretty good.
My Harbor Freight pneumatic riveter crapped out, so had to use a hand puller on stainless steel 3/16" rivets. Only way I could do it was use channel locks to squeeze the gun to generate enough leverage.
Zip ties were used to tension the underside of the seat fabric.
It took a solid day to get this done.