If you can dare to venture one state north, the very best (IMHO, of course!) is George Galyas (sp?)(GGG) in Chesapeake, VA. He has been a MTH authorized tech for several years.
I believe you'd get a lot of forum support for this recommendation!
His conversion of a PS-1 F3 set to PS-2 for me was awesome and highly professional. So far I've been very fortunate in the performance of my MTH engines, but he'd be my go-to.
FWIW...
KD