I'd be glad to help out. What platform, Windows, Mac, Linux?
Personally I've found 6-key to be optimum for switching between Minimak and QWERTY, although it's the J-N switch I've added. I believe at least one other person in the forum has come to the same conclusion. At one point I was even going to release it as MinimakV2, but updating the website was a bit overwhelming so it never happened.
You could easily add both, or just your switch. I'm happy that it's useful in any manner.