Thanks for the response, Ray. I had a Gaucho bed in a travel trailer that was pretty uncomfortable so I know what you mean about the V-groove. Have you considered a V-shaped foam insert overlaid with a memory foam mattress pad?
The hinges I ordered are different from your's in that they are supposed to fold both ways, forward and back. I'm sure mounting will be a challenge but, hopefully, not too much of one.
My needs are unique in that my wife is disabled and I want to ensure that she would be able to exit through the back in the case of a fire or other emergency. The side barn doors are completely blocked by a wheelchair lift when it's in the stowed position. With the folding seat she would be able to make it over it to the back doors. She'd be without her chair but would be able to escape the vehicle.
Although I have two rear seats, a 4-passenger and the 3-passenger, I'll seldom use the 4-position seat and will add additional anchor points so the 3-passenger seat can be alternatively be installed as row 3 for daily use or in the back for camping, leaving room for a traditional, flat bed in front of it. In that case, the fold-forward option would still allow her access to the rear doors.
If this is successful, I'll order a set of hinges to modify the 4-passenger seat as well, although it will only need to fold forward. We would seldom need to carry more than three additional passengers so the 4-passenger seat likely will spend most of its time in storage.
2005 E350 Super Duty Ext Wheelchair Van
2002 Itasca 35U Motorhome