So...What are we starting with? #390 was a Sound Sales bodge. We're used to those now. They got the SMS-3 motor controller right, but everything else...not so good.
The keyboard is un-bodged as well, and it gets a good cleaning.
The two rods against which the pressure pads sit are tied directly to the keyboard frame using a bracket similar to the brackets used in the Mark V.
It almost looks like something took a tumble down the stairs!
Fortunately that's not the case. The bottom of the M400 where the feets sit is made of wood that's a bit too thin. The refurb includes the addition of additional strengthening. For that the M400 case gets disassembled partially.
...and a general all 'round cleanup. #390 did not get a cabinet restoration, just a refurb of the insides.
<-- Reassembly begins
New tapes go in -->
OK, let's check out the Vermont scene -->