Hey DjC, you've been busy on a few post
good to see. Our other US members can probably help you out with good techs for the west coast (and I'm sure they will when they see your post). That said, there is quite a bit you can do yourself if you are handy with a soldering iron and have a decent multimeter handy. Lots of great tech support here particularly from MJMP (our resident tech guru and all round nice guy).
So when your MP1s arrive, post us a few details so we can help more with recommended mods etc. When you turn the MP1 on it will display the firmware/software version. The last revision (EPROM) for the MP1 is v2.01. MJMP can supply the EPROMs for you (very easy change, take off top cover, remove current EPROM, insert new one
).
Check the tubes, it's most likely time for some new ones, check out the tube threads for ideas as to what will suit you (very subjective area tube choice)
Noise mods are worth doing as all the electrolytic capacitors are well past their use by date and add to noise. These mods require removing both top and bottom covers, de-soldering the old caps and soldering in the new ones. But if the units aren't too noisy no real need to bother just yet.
The MDRT (Machinator (nice guy BTW) Designed Replacement Transformer) is a very worthwhile mod, really opens up the MP1. MJMP gets a batch made from time to time and not a particularly hard mod to do.
Lots of good threads here re various patching options, fxs, poweramps/cabs and ideas, again a subjective area but a wealth of experience from all our members.
Anyway, a good week is coming your way with 2 new(ish) MP1s, enjoy