Well after a lot of work, and bodging, I have DMR+ running.
Several problems, the port number I was using for the tune didn't match the master login, or at least I think that was what the problem was.
So now I have separate MB ini files for each network these are copied over the MB ini file and then MB service restarts.
Which brings me to another question.
When using these customised MB ini files, is it best to disable all the other modes? or does it make no difference?