I purchased the IMS 3.2 tank and YZ seat with the soft foam from Baja Designs. There is both good and bad. Good is the improved egronmics. Bad is a sore rump. I tried the combo at the San Luis Obispo ride on April 9. I think the orignial WR seat better because it was wider and seems softer. I base this assessment on my long rides in the desert. I could change my mind, but if I ever do a long ride in Mexico, I might go back to the original seat. Never the less, I can hardly wait the try the YZ combo at Carlsbad MX practice.