subframe

Looking at Rock and Roll beds for my T5 - the array of options is baffling. I'm going to go for an m1 tested frame, does anyone know what the function of a subframe is? I've seen some advertised "with m1 tested subframe". If the seat is m1 tested anyway, what is the function of the subframe...

Hi All, Hope I can get some quick advice here... Took my van in for a service - it's at 45k, so wasn't expecting anything to really crop up. However, I'd noticed there were different sized gaps between the front tyres and wheel arches on the off and near side, so wondered; if the subframe...

I've recently bought the seats from ebay, In the details it said they would fit with a small adjustment to the subframe. The holes in the sliding rails on the seats are almost 100mm (50mm each side of the subframe) wider than the subframe itself. What is the best way to get around this? I'd...