I'm impressed by the ease of use of this simple machine. Some quick problems, though, that I would love some help with. I can't get the corners sharp. I am using a 50mm EL-Nikkor 2.8 so the lens isn't the problem. Short of buying a glass carrier, how would I determine if it's simply negative curl creating this issue? When I stop down to f/8 on an 8x10 print, it's only noticable when you come pretty close to the print. At 16x20 it looks pretty bad. It's not one particular side or corner either, it's all of the corners though the rest of the negative looks sharp. Does this sound like alignment or simply the usual 35mm negative curl? Second, my enlargement exposure times are ridiculously short. I was using some old Agfa VC RC paper in Ilford Warmtone developer. At f/8 for an 8x10 even a ten second exposure is pushing it. At f/5.6 and a ten second exposure, the paper is spending maybe 15 seconds in the developer before I have to pull it out. How would I go about getting longer exposure times so I can actually dodge and burn? I don't want to go to f/16 as diffraction noticably cuts down on sharpness. Would a dimmer switch work? FYI, the bulb is 75W. Third, the negative popping is absolutely driving me nuts. In the five seconds it takes me to get a sheet of paper out of the bag (paper safe is in the mail), place it in the easel, and turn on the timer...the image is already out of focus and comes back into focus during the exposure. A wonderful blurry print. This is the one problem that is really irking me. I would like to get the universal Anti-Newton carrier, even if it only solves this one problem...but then, isn't that carrier nearly the same price as a cold light head (please correct me if I'm mistaken)? Wouldn't that also solve the negative pop due to heat? But if the glass carrier solves both the corner sharpness and the popping vs the cold light only solving the popping, I think I would opt for the carrier for now. I'm still pretty new to printing, folks, so thanks for any words of wisdom you may impart upon me.