You'll run into a bunch of similar situations as you progress ..
I just follow the directions as best they are written and then just determine based on how the hole looks (does it need deburred?) and how rivets fit (Does it need match drilled?).
I'm on the elevators now .. the instructions are great but there are situations where you may have to use the experience you've built up on the previous assemblies to make a determination.
Really just keep in mind the reasons for dimpling and deburring .. aesthetics and preventing shearing (dimples wearing and falling out).
If you have to jam a rivet in then go ahead and match drill it again, things shift slightly sometimes, inspect for burrs, repeat, etc.
Edit: unrelated but since you're just getting started this may help .. that rivet gun with the anvil can do some cosmetic damage to the skins (burnishing?) .. I simply had to get over it and keep in mind the painter can fix just about anything, including smileys. I think I'm up to around 4 smileys so far, I just put a yellow "smiley" sticker over them and move on.
#140376 RV-14A QB IO-390 Thunderbolt
Progress: Engine and Fuel System Testing
Last edited by bkervaski : 05-30-2017 at 07:15 AM.