ORIGINAL: Pat Roy
I like your selection in standoffs. Especially where longer ones are concerned that makes for a very good vibration damper and greatly reduces twisting loads from engine torque.
Yes, it's rock solid yet weigh almost nothing.
I make these things in 4 foot long strips. I cut a piece of lite ply the correct width for either a DA-100 or DA-85 (I do both) and then epoxy 3/4" square oak along each side.
Then when I need one for a customer or a plane I just set my table saw to the proper width (1 3/4" in this case) and slice off 2 pieces. They are exactly the same size and square, and I can cut to any width I want in about 2 minutes. I then use the template to mark the holes for drilling which is the most time consuming part.
TF