Removed the finish build up from the leading edge of the pocket with an emery board / nail file, (carefull not to pull the finsh off over the edge) trying to get the pocket flat, must of been over half a mm in places...
Went for the thin bit of card i had cut as a shim. - bit off the front, so less needed at the back?
Neck back on, able to get a couple of turns on the saddle screws so they are off the deck, get a bit of string to fretborad radius without the action being sky high...
Neck seems to have lost a little relief in its removal and refit, not back bowed but almost dead straight, with the lightest of string tap at 7 and 9 when capo-ed at 1 and held at last.
Its defo better - Action just under 3mm bass side, no real buzz unless plucked hard
May slacken the russ rod 1/4 to give a bit of relief back, may then be able to drop the action a smidge...
Please keep any advice coming...