When I was first getting into printing, and watching YT vids on it and such, I remember a tutorial stating that one of the best things you can do to succeed in printing is to only print one piece at a time. I stick to this advice 90% of the time ................... but for a build like this, it would take months to print the parts one at time. But I do believe the multi part printing is leading to some of the issues I am having, and causing a bit more unevenness in the layers.
I have most of the interior support and final pieces done, save the door cards which I will do overnight tonight. In 3dsets fashion, the steering wheel is two-piece so it will turn, and the center console is two-piece, so it hinges and opens. If I had thought about it early enough, I would have mirrored the dash support and dash, but too late now.