Not really a fix but last night I upgraded my LPL 670xl by swapping out the focusing wheel to the fine focusing wheel. It's a geared 5:1 ratio focusing wheel that's standard on the 4x5 machines but an optional accessory on the 6x7 machines. It's a very nice upgrade and I like it already.

Also I taped up and fitted some foam into a lens cap for the viewing eye piece on my micromega peak grain focuser. It had cracked and was quite loose fitting. Now the cap is snug and protecting the eye piece.