I just got confirmation on the cutout size for my teardrop door. It is 26.25 x 36.25 inches with the 4.5 inch curved corners for model WD31. I slice and dice today, and hopefully will get the door installed in the door today.
Hank, Thanks for letting me know I don't have to spend another $20 for sealant.
As for the cuts in the metal frame, I have a solution, since apparently an epoxy is recommended from what I have read on product labels. I have a two part epoxy that is used for building model rockets. This stuff cures to a very hard and strong surface. It is super thick, so I do not have to worry about it running like normal epoxies. Heck, it is nearly impossible to get the stuff to mix, but when it is mixed, it is wonderful.
And as for the door seal gasket, yes, a little silicone, and additional weather stripping should do fine.