So my friend just bought a T6 LWB and wants to change the single seat to a double. Reason being it’s a U shaped layout and needs 3 seat belts. Currently it’s a swivel single. I going to do the swap but have some queries. The main downside is a double restricts access to the rear so do all doubles fold down or just certain types. The new double needs to swivel so I have seen double swivel bases, any recommendations? Finally I’m reading conflicting accounts of the switch in terms of attaching the new double seats to the floor if the van. Are the bolts holes there already for a double? How difficult is the swap and any tips on undertaking this swap. Thanks in advance