I ordered a turntable for the front seat(£250 inc. postage) from Autocraft, they were out of stock but it arrived last Thursday, with no fitting instructions.
On Friday I spent a good while staring it into submission and trying to work out how to fit it and eventually called a pal who did his a couple of years ago. He confirmed my conclusion that I had to remove the downturned mounting on the forward end of the sliding mechanism. Saturday I took the seat out having removed the plastic filler panels and the wiring under the seat. There seems to be only a pair of wires actually in use on the seat and I removed them as far back as I could from the connectors.
Cut the downturn off and reduced the height of the location pins from 30mm to 8mm to allow rotational clearance on the turntable, 4 short M8 Allen countersunk screws and locknuts fitted to hold it on. Two 8mm holes are needed in the slider track to replace the holes lost on the downturn. I then replaced the whole assembly on the seat bearing frame using the original mounting hex head screws. 3 1/2 hours (which could have been 2 1/2 had I not been interrupted) and job done.The wrap-around rear plastic trim needed to be cut down and its two locating pins pop into the rear off the frame and give a tidy finish.
Easier, cheaper and much quicker than driving to the Isle of Wight!