I got my ischial area pressure sore healed. I know what to do. I am gradually increasing my sitting time, etc. One of the things I did was to get pressure mapping done by a PT who was very experienced and knowledgeable about seating. We were able to make some adjustments to my QP that made a significant difference. My cushion is set, but now what? Do I have to buy my own mapping equipment to keep it set right? Setting it right cannot be done with the basic hand check procedure.