If I recall correctly, the XLSW was a unique version of the XL system which mounted only the 47mm 8.0 Super Angulon. A regular, used XL system was my first investment in medium format. It was a disaster for me. Mine had a unique focus problem caused by a prior owner's abuse of the lens mounts, but the basic design and material used to construct the camera were terrible. The most apparent issue was the focus mount, which used exposed (i.e., dirty) helical grooves, ala Kodak Medalist, to drive lens barrels by three plastic tabs, which broke off sooner or later. The lens choices came in several levels of quality. All were good; the best were as good as could be had at the time. I ended up saving the lenses for a medium format view camera and trading the body, lens barrels and such to a dealer. If I ignore the hundreds I spent on getting bogus repair attempts, I broke even in the end. In short, the XLSW as a stand-alone model might be worth buying for a few hundred dollars, but IMO buying into the XL system is just crazy today. If the focus is stiff, dismount the lens very carefully, clean and try a wipe of silicon lube. These parts were intended to be self-lubricating, but the plastic used didn't last.