J-Stringers cut, fit and secured today. These were originally already completed when I bought the kit, but they were removed for sandblasting and were damaged enough to just get some new material. Was pretty cheap to do all considered.
Not overly complicated so things went pretty smooth. Filed them at the tail to have a smoother profile vs the chipmunk cheek look you get without.
Also decided to make the bottom stringer out of aluminum as well.