I have an older boaphile rack (pvc) made for rubbermaid 2221. It has back heat but the tubs are not getting hot enough in the bottom half of the rack (even though room temp is at 75F). So, I am thinking of installing 4" belly heat. My question is, would I use a dremel to cut out slots in the side for the tape to weave through? I am asking because I would hate to go ahead with the dremel and realized it doesnt work well on the pvc for some reason and ruin the rack.

