Hank, you can loosen and tighten at will... That is what makes it so versatile! Tighten up for the twisties and loosen a little for the long drive home! It does not directly affect how the seat belt works.
Hnd kla, glad they worked for ya! The CG Lock is a great inexpensive tool to keep you planted in your seat without any modifications to your interior and without endangering yourself with a poorly installed harness.
After this week, the price goes up! So please, get them now as they won't be any cheaper than with us, right now!!