Does anyone know the required strength of the mounting points of a car seat? I'm working on a new sliding mechanism and don't want to damage the integrity of the seat mounting. "Child seats" have rather poisoned the search results for this.
No points for "don't do it" or "buy one in" - what I'm building simply isn't available - a 2-3' track extension into the rear of the vehicle. The extension is only while the vehicle is stationary so it's really down to the material which will probably be a little weaker than the thick, folded steel of the regular runners. I'm just looking for a baseline I can work from.