Of the new arm doesn't work, I bet you could use your existing arm and ream it from the other side or worst case, drill it out and use one of those taper bushing jobs to relocate the end to the upper side of the arm. Looks like you would gain some good clearance that way. That and a good set of bump stops are in order.
I'd have to cut a big notch in the frame to make that happen. And yes sir air bumps are planned.
I've been known to fly in to such events....

