Wanted to see if anyone had good suggestion for removal of flush nut plate rivet. Had one shop head deform as squeezer not centered we'll on shop head. Deformed head looks like it cracked as well so planning to replace it. Have read other threads on removing rivets. Most talk about an470 style not flush. Assume process is same to drill with smaller drill maybe like #42 just to depth of head then try to pop head loose. Head is captured in countersink with flush rivet so not sure if this works. Once head is gone can remainder be tapped out from material and nut plate if nut plate flange is supported. Wondering how tight rivet is in material and also nut plate. Should I drill smaller hole in center deeper than just head? This relates to nutplates on HS-1202 stab front spar where HS-1224 doublers and nutplates are riveted per step 5 page 09-04. Always appreciate the expert feedback for this first time builder.