My BLVD 70 is RF tethered. The tether strap is snug to the point that if I were to pull it any further, it would change the angle of the seat. Despite being quite snug, the tether connector and the D ring often squeak against each other when I drive over a bump or something, and it's annoying. Any reason not to put a tiny amount of WD40 on the ring itself? Not on the webbing, obviously.