You are doing great. I love the way you are being meticulous in fitting your new inner rocker. It pays to put in that extra time now, looks really good.
I think everyone has had to deal with gaps sooner or later, especially as we start out, I know I certainly have. You can see on my build where my passenger cab corner had that same type issue. I just welded a strip across both seams but now I wish I didn't since I found a better way. I guess I just chalk that up to leaning!
. If I had known then what I know now (often overused statement), I would have cut an additional inch or two from the original metal and butt welded a strip between the old metal and the new. Basically two parallel welds but after grinding it down it would appear as one single piece.
It's also good getting the wife involved. My wife will help but when it comes to sparks she is not so willing. I will say she can block sand with the best of them. I'll need that help very soon!
I don't think I picked up on your name? What do you prefer being called?
Steve