just use a DA, save the shoulder.... that's gelcoat.... make sure you flatpad the DA.. it isn't metal you'll gouge it if you work the edge of the DA and aren't careful.. I've seen guys ruin boats like that..
you'll need to V grind the cracked areas , taper them out and lay up some mat/cloth....
Chief you might want to add a couple 2x4's length ways to prevent the the 2x's with the wheels from rolling over and cracking the top at the bolts.
Ask me how I know.
I hurt so bad from doing that that I almost feel like putting a soft top on it...and it was really nice in the garage not having that thing to bump my head into...


You are moving along my trademarked "hardtop progression" nicely.....
Next tool for your hardtop isn't a DA, it's a Sawzall.
-G

I dunno....man that's hard decision to drill into the windshield frame. Progress on the hard top has been held up by absolute unbearable heat...I have nowhere to work on it but in the driveway and the heat has just been unbearable for a while now
Looking at that photo above, I already don't like the rails on the bed.


It's in Sean's thread Z71paramedic.