I had been stumped for a while over some rivets I had missed when assembling, not impossible to get to. I finally studied it to death and came up with the solution in the center photo. Cut the handles off a pair of pullers, and drilled holes in the stub handles for use by a pair of long handled needle nosed pliers. Worked very well in fact, transferred the leverage to outside the inspection holels on the belly. I had to flip it back on its side however to do this, will do the fuel pump removal trick also while in that position to prepare for arrival of the Viking/Honda engine.