I just got the cleco’s and yes they are awesome. Also bought a pneumatic crimper too. Should of bought that when I started the sheet metal.
To roll the edges I first tack welded the skin to the door. Next I made a relief cut on the backside for a straight edge. Then I bent to a 90 with an adjustable wrench. Once I got to a 90 I used a hammer n dolly. I finished it with a clamp and a small piece of 1x1” square stock to pull it tight. Aka lot or redneck ingenuity