I just bought my first "large" enlarger, a no-namer (probably 30 yrs old) that i s supposedly a 4x5. It is in good shape, very well built - and has a cold-light head as well as the condenser head. The problem is, on every smaller enlarger that I have ever used, the negative ca rriers only mask a very small edge of the negative all around the perimeter when mounted in the carrier. You project nearly all of the negative. This carrier only has an opening of 3 1/2" x 4 1/2". Is this normal for a 4x5 enlarger, or did I buy a white elephant?