Wow, all great information, thank you. I replaced the rubber with some 3M silicone/rubber material it was 1/2" wide x 1/8" thick. I also made up a new power pack and took some test shots today. The rubber seemed to grip well and the 2nd roll wound up fine. The first roll did not fare as well due to some very sticky rollers. I'm dropping of the 120 at a local shop tomorrow.