I have a very good condition used Ribtect carbon fiber seat for sale. I mounted it and used it on my shifter while dealing with a rib issue and I don’t see any immediate need for it. It is a size XLT which is the tall version. I am 6’1″ 220 and it fits well. I trimmed about 1/2″ off the sides at the top to relieve pressure under the arms. This is the most comfortable seat I have used in a kart. Asking $300 obo shipped. I can email or text pictures upon request.