I have a lot of experience in wearing corsets. I started 25 years ago. I have the hip belt from My-Steel and can wear a corset over the belt. I used to wear Vollers or Axfords corsets, but when I wear the belt it does not fit well. So I have some custom made corsets to wear over the belt. They are just a little bit wider and longer than normal that when you stand and sit the corset wonโt get stuck between the belt and yourself.
Another thing is to wear a body underneath it, this will smoothen the edges of the belt and make sure you can move more easily. It is also better for the corset, If you might sweat it will mostly go into the body, not the corset. I use Wolford bodyโs myself as they are from merinowool. Verry soft and they are verry nice to the skin.