I wasn't crazy on the saddle that came on my P2, ISM adamo prologue. Tried a Cobb JOF55 and didn't like that saddle. My local tri shop let me demo a cobb max that I have on bike right now. It feels ok. The ISM I had problem with numbness at times. Saw fi'zi:k mistica saddle but can't figure out if a would need a large or regular. Regular is 55 or front and large is 65mm on front.