[frizzen]

The boom extension is just aluminum stock. 2 side plates, 2 plates for top bottom, with 4 pieces of 1/4" angle. 2 screws hold each angle to each side. After figuring out a pattern, I screwed matching plates together through waste areas, drilled corners and cutouts, then stuck a metal blade on my scroll saw and play connect the dots. Little file work to clean up It seems strong enough with just the top plate, but i wouldn't want to side load it too much.

I used 1/8" steel rods for the attach pins, small o-rings to retain pins so you can quickly take it on / off without fumbling with E-clips. (Planning ahead incase i get the chassis powered, since that's a LOT of boom to plan for swing ahead of the steering axles.)

No worries, i've trying to figure out something nice enough to send your way.