Hi all, I'm in the process of acquiring a Beseler 23CIII enlarger, and I was looking for a negative carrier on eBay for it. At first I was looking for an 8072 universal A-N glass negative carrier, but the only one I saw was in the completed items, and went for $120 But the 8074 is going for $20 or so. I figure a piece of A-N glass from Focal Point will probably cost me around $25 all told. Is there any reason I won't be able to just swap out the glass? They aren't welded together or anything, are they? TIA.