I have 7mm booties and xxl DaFins and get serious pain on the lateral sides of my feet. My bones protrude there more than other peoples. The booties have two layers of overlapped rubber close to where it hurts. I can either take some of the rubber off the bootie, or grind away the side of the flipper and drill holes or make a slit in the foot pocket, or both. I don't want to ruin the bootie or fin and wonder how others have done similar mods before I dig in.
Someone here said he "vulcanized" the rubber either before or after he drilled holes to insert laces; how do you do that? With a blowtorch?

Any suggestions?
