Ok, so after thinking about Force Fins for a while, I decided to buy a used pair to try before I invested in anything more costly. I dove with them today but forgot to see if the bungee was sized right before diving. It was ridiculously tight causing my foot to be driven so far in the foot pocket that the comfort instep was being pushed out the front. I was doing a beach dive and I found it a little hard swimming out. Once under water I was pretty happy with the fins even though they were severely squeezing my instep. I did feel that i was using a lot of leg to move through the water. I have since loosened the bungies a bit and hopefully, that will make them more comfortable. So, assuming that the tight bungies were the cause of the comfort problem, what is the proper kick for these fins? A flutter? Thanks for any advice. gary