Got a response from Van's that an MSP-42 pulled rivet would work for the last rivet in the aileron gap seal on the right wing. I set this rivet with the puller then put the right wing back in the cradle.
We moved the left wing off the stand and put it on the bench. I cleco'd on the aileron brackets and the SB reinforcing angles to the left wing. Drilled all the mounting holes, disassembled it all and deburred all the holes. Reassembled and tried to squeeze a rivet in the inboard bracket. This rivet was unsatisfactory so I removed it. Set up the gun and sucessfully set two rivets in the inboard bracket.