Does anyone here use one of those old contact printing machines for LF contacts here--the kind with many bulbs in a box underneath, a diffuser and sheet of glas s for the neg(s), and then the paper goes face down on that, and there is a plat en to hold the whole thing down? I've used one long ago, but just for small for mat contact sheets, before I was using LF.

Do you feel you can get enough control over burning and dodging by switching on and off the lamps (compared to contact printing in the conventional way and dodg ing by hand), or are these devices really just suitable for proofs, and not for fine prints (without making lith masks and such)?