Uhhh, What can I say? "Get Bigger fins" ...LOL.
No actually I’m just kidding. I dive with Rock Boots. I think they are the greatest. I am using a rather antique set of "Jet Fins" They seem to work well with the rock boot system. I use spring straps on my jet fins. The spring straps make it easy to get into and out of the fins and I find that they are more comfortable than the rubber straps. Plus, they don’t break.