[MysticLlama]

Okay, was just trying to figure out the geometry of this thing.

When compared to my stock, fraying, 3pt belts, I think anything is an improvement, but I don't want to skimp putting stuff in in a safe manner.

What I was going for with the seat rail/crossbar mounting was to hopefully find something that would be safe for multiple drivers.

I'm not so much trying to avoid holes in the floor, the car is way beyond stock anyhow. What I want to end up with is the option that is the best for different size drivers without being unsafe to either of them.

So I guess the best bet is aim for 0 degrees for the tallest driver that goes to 20 degrees for the shortest when the seat is pushed forward and hoping that is a single mounting point?

I'm still missing where the lack of safety is when the straps aren't straight down, but I'm sure the guys that built it put more math into it than I have. Looking at my setup, even with the belts attached to the side rails I can't really see where the additional load comes from, given that the belt fastener is already angled that way (mine if pulled straight out from the buckle split far apart vs. going straight down).

Seems like if the seat bolts snap, you're in way bigger trouble anyhow...

I just got concerned when I read the "pulling through the floor" bits on several other threads all over, and though the seat mounting points might be a better bet since the lap and shoulder belts are supposed to have most of the load and have separate chassis mounts anyway.

Besides some rules, are there any safety downsides from using a peice of barstock across the rails that falls into the correct angle of the sub belts? Similar to the BK mount, but a custom made one since I didn't see one that would work correctly for my app.

This car is intended for 90% street and an occasional DE now and then, for whatever that's worth.