Hey Max, while it's with MJMP, maybe get him to change out all the jacks as well as the pots (he has all but original input jack IIRC), and maybe tube sockets
, or go like Mike did, MJMP has new (stock circuit but with better components) tube boards. Then, along with your list, you've upgraded pretty much everything that can be. Mike bought all the jacks but hasn't put them all in yet.
So Mike's MP-1 is a V1 (with top switch (DjC!!)) which I bought new (and it's done a gazillion gigs
, never missed a beat, ever..), always lived in its rack.
Mike has installed:
New (improved component) stock tube board
MDRT
Noise Mod
Battery Mod
Rear Jack Mod (which replaces the front input jack also)
And he has all the other jacks ready for swap out (fortuitously they don't get much ware).
I.e how do you bring a MP-1 up to the best it can be so it will last another 25ish years