Thanks Mike, I'll post the specs for my box on my original comment, I should have done that in the first place.
I see how these boxes will always be a little wonkey, but I think the look has a kinda charm somehow like Tetris blocks or something. It's a different style than traditional dovetailing, so I think a little bit of gapping and dog bone rounding could be fine and I could still have a slick product, but this one is definitely too loose.
I don't know, maybe after a while of messing with it I might l want to eat my words (or erase them) but I think they could be a cool product- albeit a children's product- which is primarily what I do anyway.
Yeah, I wouldn't file or rasp anything, not just yawn, no profit. If anything I might trim the corners with my scroll saw.