Hi Guys! Does anyone have any experience using the Sorbo Docket rubber trimmer, that allows you to repeatedly trim your rubber anywhere from 12 to 20 times? They go for about $320 to $350 in the US. Are they easy to use? Do they only work with Sorbo T style rubber, or can you use them with the normal rounded rubber? Do you have to use Sorbo's teflon coated razor blades to cut the rubber, or will ordinary blades do the trick? Any insight would be much appreciated. Cheers.