Originally Posted by CSMRX7
I have used a CG Lock before, and will use one in my M3. They keep your hips in place and allow your legs to relax. The chalenge is that you will still have a lot of shoulder movement, so my back still gets sore, and it does force you to hold the steering wheel too tight just like a regular seat belt. I know it is only a 1/2 solution, but safer than a harness.
Try locking the belt with the old seat slide technique. It will hold your shoulders and your hips tightly.
1 Move seat back about 4-6 inches.
2 Quick yank on belt to tighten and lock it.
3 Move seat forward to normal position with belt cinched up tight.