Thanks for all of the responses. I plan to order a proper rib vest in the next few days. It will probably be a Ribtect4. My next goal will be to get a new seat. One thing I want to confirm is the best way to measure for a seat when keeping a rib vest in mind. I assume that when looking at chest width dimensions for a seat, you want to take a measurement of your chest size WHILE WEARING the rib vest. Is that the best way? I also assume that wearing the rib vest might create additional spacing down by the hips that would require additional padding.