[QUOTE=Glen Geller;128412]I don't recall which is preferred to install first, the 5/8" dia (1080) or the 3/4" dia (1280), does anyone recall which size goes on the hydrosorbs first?
I starting using the 1080HD 1280HD combo following the TW conversion (now 30 years ago) which puts more weight on mains. Yes a little stiff for the first few months but I got a lot longer life span between bungee changes with the combo.
I started out putting the larger 1280HD on first and the 1080HD on top and did that for probably 6 ore 8 times. My thinking was the 1280HD is stiffer so being on the bottom stretches it less.
In recent times, maybe the last 4 times, I've been putting the larger 1280HD on top of the 1080HD since the smaller 5/8th bungee fits down in the hydrasorb ears better and provides more room for the 3/4 inch to flatten out.
Either way the top bolt is an interference fit. I normally put a thin aluminum scrap metal strip between the bungee and the bolt which allows the bolt head to be tapped with a hammer past the bungee with no damage to the outer cloth.