My bad, Dakine harnesses it is a niice retro fit that places your hook lower.
This is the original, Small spreader, small pad. All bits came out easily. and the big wing pad slid in to the recess for a dakine harness. as below.
Needed to cut a little of the tabs to feed into the cleats of the harness. No worries. Put the back/down strap on the outside ad the upper strap on the inside to prevent pivoting upwards.
Its got straps on the spreader that pulls it down even further.Left hand side of the photo below.
Ride engine????A much cheaper way to make you harness feel at one with the rider.