I think it's just a matter of practice and persistance. The first bent i rode was a chanllenge mistral which has 20/20, which i could hire on an hourly basis. I then went and bought a ActionBent Hiracer. There's no way i can afford to buy another bike so i've just over time, learned to ride the HiRacer as there wasnt another option for me.
I'm 5'8" btw, dunno what my x-seam is