I wish there were a "thanks" function here as in a couple other of the boards that I frequent. There are a number of very helpful answers well worth a thanks.
I did a 2-1/2 hour ride this AM after running the seat in by 1/2" and leveling it and seem to have found the magic setting where it irritates and I still slide forward though neither as badly as before. The good news is that I could tolerate it that long but I found myself up on the pedals a lot toward the end. Good thing I like getting up. A ride of more than 40 miles would be a real problem