Hey Chris,
You have the advantage of living with your strap for much longer than me. Have you "conditioned" it at all?
I was just thinking that if it's like a car tire rubber compound, wondering if using something like a rubber protectorant would help keep the strap softer?..
Just a thought - wondering if any of the RM moderators could pass this comment along to the folks over at RM to see if we can get an official answer on this.
-Sam