I had a Reg sized Phantom, and that thing barely fit over my ass. Im a 36 inch waist, and 190 lbs. I hated that thing. It was so uncomfortable. Happy to say that I just upgraded to the Ultralock/Lockdown, and its a game changer
"What can ozone do to rubber? A common effect includes cracking along the exposed, stretched, or stressed face - this is sometimes referred as dry rotting." - quote from Apple Rubber's website
If your saddle is attached to the tree as your climbing, shouldn’t that negate the need for the overall’s ? You mentioned you wear it due to weight of your saddle as you climb, but the lineman should be supporting the weight of your saddle. Just my thought