Well much to my surprise, with enough clamps, I somehow got my left side door skin to sit flat without bulges when clamped down- without heat!
Could not believe it. Removed and reattached to be sure, and double and triple checked for cupping that would cause the skin to pop back and forth. The door skin looks good with no weird angles, is tight, and no weird angles.

So now the second will be a piece of cake.....right? Nope....will get it eventually though. Atleast I know its possible.