Hall, you wrote "So your typical Cajun tuned dry accordion would be how many cents off?"
The propper answer to that question is ZERO.
There are many degrees of "wet" , but there is only one degree of "dry". With "dry tuning", all four reeds
of each note are tuned to EXACTLY the same pitch, plus or minus ZERO cents off from each other. That is "dry". Anything different from that is some degree of "wet". Hope this helps you understand a little better
Jude
I asked the late great Kenneth Thibodeaux to wet tune my accordion (he made it for me). He tuned it off 15 cents and said that it was "barely wet". I love it.
Well Jesse it ain't real wet but more that if it was only five cents off. Now that is what I would call barely wet. The key is if you like it. That's all you need to worry about. As cajun accordions go 15 cents is on the high end of the barely scale. IMHO!!