This has been really annoying me recently, currently I am printing some very dense 35mm negatives in a LPL 6700 with the standard holder with its masking blades. I also have a fairly common LPL 12x10 2-blade easel. I see when adjusting the blades in the holder that stray light falling on to the flat adjustable easel blades, no problem at all, doesn't seem to effect anything, and I find helps in adjusting the image. Some stray light on to the unadjustable parts of the easel though (top and left side) reflects onto the print causing faint lines of extra density in the outer few mm of the print, problem is you can't adjust the blades in the mask to get them all perpendicular so you either cut off part of the print or put up with some easel reflection. This is particularly bad when trying to print more or less un-cropped.
Has everyone just put up with this sort of thing over the years? Its like a built in expectation that one is going to cut down the end result anyway, not an idea I am overly happy with as why shouldn't one print the whole negative sometimes.
In the short term I have ordered the 35mm insert which I believe replaces the bottom glass in the holder although then of course it means only the top AN glass is then holding the negative flat.
Longer term it seems I need to invest in a 4-blade easel?