What do you mean by "stretched 4x5 enlarger"? When you say 4x14, do you mean centimeters? How can you print 12-inch long negs when even 8x10 enlargers only go to 10 inches?I've been printing 120 panoramics for years using a stretched 4x5 enlarger. The enlarger will handle a 4 x 14 neg and has a colour head. Most of my negs are around 12 inches in length.