Someone (sorry, reading with Lynx the attributions get all screwed up so I don't remember who) asked about my bad experience on Mantis...
Let me put it this way: Traditionally when riding Mantis, I would straddle the seat, positioning the seat pretty much as high as I can get it...which, given the lack of legroom and the size of my thighs, means just slightly above my knees. Then I pull the shoulder bar down until it touches my shoulders. Trouble is, the safety belt is too short to allow this. Either the shoulder bar has to come down lower, which compresses my shoulders and spine, or the seat has to come up, which tends to cut off the circulation in my legs. The bottom line is, since they added the safety belts, I don't fit anymore. If the seats were farther apart so that I could stand with my feet apart, or if the seat were narrower so that it would fit between my legs, it would help. Barring that, making the safety belt a few inches longer would also help. What it all boils down to is that Mr. B. and Mr. M. designed a train that I don't fit. :(
--Dave Althoff, Jr.