Later blooms of this looked better, although one had a split synsepal. But...I think I figured out what this must be. Many years ago I had a bunch of Carol Kanzer seedlings that I bloomed out...did a lot of trading with them. I got this plant from a friend of mine who sent me a load of plants after he got divorced. This must have been a Carol Kanzer I sent him, but at some point he must have just relabeled it "schlimii".