Is the seat angle adjustable on the Catrike? I'm going to have to be sitting fairly upright to avoid neck strain, and I'm beginning to suspect that the Greenspeed may be just a little bit "too recumbent" for my neck. I am 5'4" with an "x-length" of about 40". I was also never very good at climbing, though my long-standing spinal cord compression may have something to do with that. I want really low gears, with a low of 15" or even less to ensure that I will be able to ride up anything, as I know I'm only going to be able to manage a couple of miles per hour at least at first, and I would like to be able to tow a trailer to go touring.