Neil,
I retrimmed my HPE seats, so i've done this.....memory reliant next...
Separate the two halves by undoing the 6 large crosshead screws,3 either side, under the large plastic covers.
The winding mechanism is bolted to the seat squab somehow,and is a stand-alone unit.
If you decide to swop trim over:
The trim is held onto the frames with tucks under the frame. [stiff cardboard is sewn into the cloth]
Use a small screwdriver to get a 'hook' onto the end,then gently pull down/away.
Once all the sides are free, you'll find hog-ties buried quite deep in the foam holding the centre of the trim.
Use a pair of pointy-nose pliers to twist and bend the hog-ties apart [they're not very stiff]
To re-assemble,you'll need a packet of hog-ties and hog pliers [should be obtainable from e-bay or your
local trimming shop]
