Just finished fitting one of these. To be honest if I’d known the level of hassle I wouldn’t have bothered and would have paid someone to do it
The video is nonsense, the screw to activate the swivel actually has to go to the rear of the seat not the front. With my seat there was absolutely no way it would fit at the front.
Removing the feet from the existing seat was a right chew. Mine were riveted, spot welded and then fillet welded too.
2 of the holes in the base were not quite inline with the seat runners so needed enlarging (out by a couple of millimetres) and there was no way I was using piddly steel ‘weetabix plates’ to hold on the seat so I’ve had to buy longer bolts and will use nylocs. Also the seat needs raising (4mm) on one side as the slide mechanism sits lower than the other side. Finally needed to slightly grind off a small part of the seat to to make it sit ‘true’ in the frame.
Don’t know whether I’ve been unlucky but this has not been a fun exercise.
The plate sent was definitely correct for the van as I double checked before ordering, as a bit of kit it’s robust and in my opinion likely stronger than the original seat mountings but Sugoi need a better video and instructions…