I'm currently looking around at second-hand drive-from vehicles and came across one with an unusual vertical locking system - picture one. I looked around (on ebay) for a more conventional lock to get an idea of the price to change something like this, but no joy on ebay, and I found a dealer price of "from £1200" fitted !!!!! i.e. Forget it.
I seem to remember a post by BM suggesting it was simple enough to make one, and since I found a photo of a mechanism, I thought I'd post it here in case anyone wants to make their own.
Still looking for a suitable vehicle with the right cost / value. If nothing else, it will make me finally get rid of the original F55 legrests!
Long time since I have posted pictures here. Hope I've done it correctly.