Spent way to long on this and forgot to take any pictures, but Robert August came over again this morning and we spend about 8 hours hanging out in the garage and finishing up the l/h elevator & trim tab. It all came out ok except the instructions have you close up the trim tab with no mention of dimpling the holes in the ends. I didn't catch this until after riveting the tab spar per instructions, and then looked at the rivet callout on the print and discovered that while the rivets on the elevator closeout are pan head MSP-42's, the ones on the tab are supposed to be CS4-4 flush head. I can't see any way to dimple those holes unless you take everything apart again, which I'm not going to do just for a couple of soft rivets. Drawing 4 calls out an MSP-42 pan head pop rivet for the elevator closeout, so I used these on the trim tab as well, making sure to lay them out in a position that won't cause interference. The MSP-42 is a monel rivet with a steel shaft, so It's quite a bit stronger than the CS4-4 that's called out for the trim tab. Structurally, they will be fine, but at some point in the future if I decide I cant stand the look of the pan head vs the flush CS4 I might revisit this. For now, I'll roll the leading edges in a day or two, then the only thing left on this empennage will be to pin the elevators and drill the center hinge hole.