Forget the butt-joint stuff, it has zero to do with sound. Marc makes probably the benchmark of Cajun accordions. Larry Miller makes terrific boxes, a bit underrated but really well made and sound great Jude and Ed Poullard and others make wonderful accordions. I'd look around and take your time but the above makers make great instruments...
You will find all sorts of joints in the woodwork in Japan. Your comment is inaccurate. The only thing that counts is, get ready, the sound. We've had this conversation for years, it's all good... ;- )
http://lumberjocks.com/projects/76959
By the way, Jeff-san, I'm look hard at property between Jacksonville and Apple Valley. Little less than two years and I'm outta here!
Ha, ha, i typed up a long well explained comment, but "Cajun Accordion Discussion page" determined my comment to be SPAM. So, everybody just lost a whole lot of info on the best kind of accordions. You need to look into this web master guy. I don't like to repeat myself because of a technical glitch. My information was priceless by the way.