Trying to get 5 lbs. of steering arm tension. Not getting it. I mic'ed the lower fiber washer thickness and it is 0.042". The ABI PMA'ed replacement is 0.062" (p/n 3408-2). If install the thicker lower washer will it increase the steering arm tension?

I've never tried to adjust the tailwheel to any particular "pounds of tension" criteria.
I thoroughly grease all the internal parts when assembling.
Then I tighten the king pin nut until snug, back it off one flat, and safety it.
Works perfectly.
This is with two of the p/n 3407 spacers under the big bearing on the top of the fork.

The Skywagon Club "manual" has an article discussing attaching a scale and measuring 5 - 6 lbs of pull force after tightening the castle nut on the bottom 75-100 in-lbs and backing off to first cotter pin hole.