Since I pulled rib muscles on the left and then 6 weeks later pulled the cartilage (broke, pulled, cracked, who cares it just hurts!) on the right i can speak from personal experience and say GET A GOOD RIB PROTECTOR! I don’t know your build but spend the dough to save your sides.
As for seats, i agree with what was said. It all depends on your build. I am 210 with a 33″ waist and the ribtech seat is perfect for me in the upper body but loose in the hips and i’ll build up the butt area for myself.
Just my 2 cents worth.