Hello---I may be able to obtain a Durst 138S for making large prints in our college darkroom, from 35mm to 4X5 negs, up to 30 X 40 inches. In our set-up, it would be simplest and adequate to use the enlarger vertically....except for the focussing problem. I understand that a motor drive (FOMOT 138) and controller were once available for this enlarger. I've only found one reference by a user who had trouble controlling his, and no trace anywhere of one to buy. Can anyone provide info on this unit? It would be great to hear from anyone who has actually used one!