I have my original driver's seat (with a nice hole in the bolster), and a replacement which is what is currently in the car.
I want to get the arse-section of the replacement off, and fit it to the old drivers seat. There are two reasons for this:
1) the replacement seat I have actually has some fraying of the seat back, whereas the old seat back was fine;
2) the replacement is actually a passenger seat from a left-hand-drive car, so doesn't have height adjustment.
Trouble is, all my seats are 5 door ones, so swapping backs over isn't as easy

I had a very quick look at them when I had the seat out last time, but couldn't see how to take them apart without breaking plastic

Anyone know of a guide for dismantling of 5-door seats?