Wouldn't it be easier to just etch a new PC board? The new DZ125IN with the 6 pin connection might open up a lot of possiblities here. If a new PC board could be printed that includes a 6 pin socket (like the FVM Gevo) there's an opportunity to greatly simplify this installation.
I for one had always heard that the Arnold was impossible to do, or perhaps was too hard to do and still have a mediocre drive...
Hopefully once we all get good at this, Atlas will roll out it's DCC-ready S-2...
Lee