I'm using a Lepera RT66 and it is a big seat. I only have about 350 miles on it so far but I'm really liking it. I'm about 250 and my fat ass does not fill it up. If you can live with a seating position similar to a stock ultra seat you might like it. They don't make a daddy long legs in this seat, probably because it is so wide in back. Worth a look anyway. Good luck.