RE: Midwest Extra 300xs Build
I then squared up a 3/4"x3/4"x3/8" plywood block to fit snug in the rudder front block opening. I used 30 min epoxy to glue in place. Next I cut a 1/8"x1" plywood block to fit in place over the 3/8" block on both sides of the rudder front and glued them in place as well with 30 min epoxy. I then Clamped the blocks in place to dry overnight.