Hip/Dip Belt Squats

anybody have any exprience with hip/dip belt squats?

I have and love them. I prefer to do them on a smith machine though. I do them once a month maybe. They really improve your squatting technique.=)

[quote]swcalder wrote:
I have and love them. I prefer to do them on a smith machine though. I do them once a month maybe. They really improve your squatting technique.=)[/quote]

How do you do these on a smith machine?