Ok, has anyone here had experiance with R1991? Roscos Super Heat sheild? We got some in today and i am using it in our Source 4 750w 19, 26, and 50deg... the gel seems to be burning out just as fast as before if not faster though the tests that i have run... Rosco sugjests having 1/2" space on either side of the heat sheild to allow for ample breathing room for the heat to be released. test 1: Gel without sheild: burn out time 40 seconds Test 2: Heat sheild in slot 1, gel in slot two: burn out time 30 seconds... Test 3: Heat sheild and Gel in same slot: currently going on 5 mins with some color changes but no burns... Any sugjestions? Edit: Ok, after 10 mins of Test 3 i let the Gel cool down and then took a look at the damage, there were no complete burn throughs, only some spots where the color had disappeared and some color had transfered onto the heat sheild.