I cracked open the Tamiya G-6 while getting the Frog F paint-ready (plan to paint them both at the same time). This is the first Tamiya kit I've built - MAN, going to have to build some more! More parts for the cockpit then the entire Frog kit I think!
It IS obvious that Tamiya never planned for this kit to be built wheels-up. I had to do significant shaving of the gear doors to get them to fit, and looking at the gap and the upper end of the gear doors, it appears there is a small upper section that slides over the top of the main section when lowered, as there is a step to the part, and too-large of a gap when the part is laid up in the well. I used a piece of the leg strut to show in the gap, and added an extension to that upper door section to line up with what I assume is where the door ended (I could only find one decent reference photo of the underside of a 109 with gear retracted.
My resin pilot didn't want to fit into the cockpit, so I had to cut the legs off, do some shaping to the body, and now I'm painting the pilot and legs, will add the body and then fit the legs in, before I can insert the whole shebang up into the fuselage and close up with the wings.
5 attached images. Click to enlarge.