If there's a difference in tuning between the reedbanks, than it's not real Cajun as far as I concern.
They need to be in the same pitch.
Some reeds need to be tuned a littler lower.
You can find information on this forum on earlier items.
There are a lot Cajun players who play with wet-tuning.
See wet zydeco myths.
On a Weltmeister gives the first button on the pull not the same note as the second on the push.
Wilfred has that problem on his Weltmeister and let this changed.
How much will you be paying for this box? $600? $700?
1) The way the reed banks are constructed in these (all banks are perpendicular to the sound board, rather than the two outside banks lying flat), makes for an anemic sound.
2) You will have a hard time selling it when you want to move up to a Louisiana box.
3) If you get a Louisiana box, and then don't continue with learning, you could probably unload it here for close to what you paid for it, if you didn't drag it behind the car, or soak it in lye.
4) The Welties are "ok", but harder to play than a Louisiana box, and then only after being worked on a bit by an accordion shop.
5) If Cajun, or Zydeco, is what you want to play, you can get it tuned right, right from the maker, if you get a La. box.