raw69
I have been using an insert called symmetry, I have been using them for over 4 years. I highly recommend them. They not only help with foot problem, wife has spars she use them; But with knee and back problems. They are on the spendy side but you only pay once, they dont ware out and hold up in water very well. I am not any way proffet form them or am I part of the company just a happy customer.
Ghost