I am a huge fan of the "Cutt and Butt" method. And I find that it works fine for cab corners, you just have to leave the corner loose until you get there. I highly recommend "Fitzees Fabrications" on YouTube. He does a real nice job on education. I will add a few photos of some of my work with this method.
Steve
In my photo of the inner door bottom, you can see that I left the outer skin in place. This let's me know that the replacement panel is in the right place. I see my captions are ine photo off, but you can figure it out.
