Hmmm.... welll...
I went and tried it...
...and bought it! My GAS for an MM has been solved. It really is a very very easy thing to play. The neck is in pretty fine nick for such an old instrument, tuning doesnt appear to be a problem although as you said the E string is a bit "off" but nothing that cant be fixed with a new string and a proper set up. rather impressively the case that came with it had the original Fender neck tag with the bass testing dates on it, and the original owners manual! I've had a quick shufty on the Fender site and the serial number dates it to 1976.
As for the body again as said above its been sanded down BUT whoever did it did a fine job on it. I also wasnt aware of body or arm contours on the body of the guitar but the manual proudly states "Offset waist - easier to play when sitting (patented)" so perhaps it was supposed to be there? Either way, its in need of a respray and im canvassing a few people in the area to see what they would do it for. Got him down to £200 and to be honest on parts alone its worth that so im very happy with it! Tone pot is facked but thats a minor job. Even if it needs a new pot and just a bit of soldering that aint too hard.
Ill post a before / after pic soon, will get it refinned probably next month with a bit of luck.
Cheers all for your help!
Stag
:-)