It would take some time but I guess you could MOD your GB straps with a ruler and a white sharpie.
Even when using the measured straps, I find they aren't perfectly exact. Yes, I am that way. I can tell if they feel just a bit off and it will bug me to no end.
All the textures, be it wood or synthetic seem to wear out. Wood absorbs the oil in your hands and eventually it changes the feel of the rings somewhat perhaps, I think.