Hi Brian, The Sutton harness is indeed a complicated affair. This is a scan of the MDC harness instruction sheet. (Part 4 attaches to 5 which in turn attaches to 1 and 2.) The leg of the "Y" (part 4 in this scan) goes through an oblong hole in the seat and is secured to an airframe hardpoint - in the case of Hurricane, a transverse bar behind the seat. The top end of part 5, is attached to a cable (that faint line visible in the scan) which goes through a hole in the headrest and is s