Left Wing - Let's rivet...or not

I'm going to have a self-inflicted hiatus from building for a few days.  I started riveting the ribs onto the front spar, and while it went fine, the rivet sets I have are 90% fine for the job and 10% begging for me to screw up.  The manufactured head of the universal rivets (these are the round head rivets, not flush head) goes on the side of the rib flange.  In order to set the rivet, you have to bend the rib out of the way to be able to get the gun perpendicular to the surface being riveted.  The ribs are plenty flexible, but for the top and bottom rivets, the gun still sits at a slight angle because the business end hits the rib web.  The other rivets aren't as much of a problem because the lightening hole in the rib allows at least part of the gun to not hit the rib web.  I could just bend the ribs out of the way more, but then the rib flange gaps and is harder to get flat against the spar during riveting.  With round head rivets, any kind of an angle with the rivet set tends to cause problems because the cupped set digs in on one side or the other, causing squished rivets or dings in the surrounding metal.

I have two cupped sets - one that is just a couple of inches long and an offset one.  The offset one is what is theoretically made for a job like this.  I hate that thing with a passion.  It swivels freely while riveting, and it's never in a direction that is helpful.  The real kicker with it is that because of the offset, the air pressure has to be cranked up quite a bit to get the same amount of energy to the rivet as a straight set.  That higher air pressure makes it bounce like a rubber ball.  I'm sure some people love these for tight quarters riveting, but not me.  The straight set is great, but for the ribs it's just too short.  Sets are one of the few aircraft tools that are pretty cheap, so I ordered a 7" straight set today and am just going to pause the build for a few days until I get it.  The longer length will allow me to get the gun perpendicular to the surface without having to wrestle with the ribs as much.