Those rivet shavers are nice pieces of equipment. I have used one for many years. Unfortunately, some folks wont be able to set them correctly and leave a 3/8 or 7/16 diameter hole where a 3/16 hole should be. Also, if there is a gap between the structure and the skin, you will still dimple the back side out when knocking the backside of the rivet out. IMHO, I would drill the rivet out centering on the head then cleaning the hole up as you drill through. No dimplin on the material unless it was already dimpled during installation.
95 IH 72 passenger transit school bus w/ DT466 and 545 Allison.
79 IH Scout II/392 (0.030 over) Hamilton Injected/727/D300/Full size axles/36" Swampers/Lockers/OBA/38 gal Custom fuel tank, roll bar, tube doors.