I'm learning these new terms, tiller effect, wheel flop?? I assume this means the wobbly feeling some recumbants have or failure to go in a straight line or turn that I found with the couple I rode? Can anyone explain further? And also, which models have the least problem with this? I know of a BikeE (know they're out of business) for sale, was that one known for more stability? Some of the ones we're considering are Burley Koosah & Sand Point, Cycle Genius (husband rode ALX yest but found a little bit of this tiller effect so still wants to try another), Maxarya Ray or Ray 1, Rans Tailwind, EZ Sport, or another EZ, etc., Cannondale bent. Please give me an idea of which models have the LEAST problem with this and feel the most stable to ride. We live in NY and have to be able to maneuver if a car comes up behind us, some bumpy roads, need something with good handling but comfortable. Thanks again all for your help! CJ