Hello All, I've taken my Durst M601 enlarger out of storage after about 20 years and can't seem to get it to project an in-focus image on easel more than 2-3 inches big. If I raise enlarger head any higher for a larger print it stays totally out of focus. It's been decades since I used it but I do remember I use to get much larger prints. The enlarger can handle negatives up to 2 1/4" (square) medium format but I only used for 35mm. I don't remember ever using different size condenser lenses but at the moment it only has a pair one size. Thanks in advance.