I'm disassembling the seat, switching out the base, from 8-way powered to 2-way/manual, and I'm also preparing to install the heater pads from the original seat. I'd like to separate the back frame from the seat base at the hinge. However, it seems Porsche, in their infinite wisdom, saw fit to use a bolt with a head that's kind of a modified Torx, about an E14, although it foiled the E14 socket in my set, which jumps from E14 to E16, no E15. (Could it be an E15?) At this point it's obvious I need to consult with someone who has successfully separated the seat frame at the hinge.Or maybe it's a bad idea, and the nonstandard bolt's purpose is to discourage home garage mechanics.