No probs animal - I completely get where you were coming from. I assume the RS boys were fitting a common or garden 4pointer?
Basically if you're going down that route, ensure the seat is compatible and know any deviation from these angles can cause failure. Belt points should never share seat mounting points, and only ever use reinforced mountings... not just chav style holes in the floor and a big washer!
It's also worth noting that any 'E' marked harness can be used on the road (like a Megane R26.R) but it WILL restrict your ability to see at oblique junctions, for example. I wouldn't recommend it personally.