Buying out the clawback - How do you do it?

In this current plunging market what you pay for an AH and the actual market value when you close the sale are beginning to merge, hence a much reduced clawback %. This might tempt some to consider buying out their clawback and free themselves from the common rules of the AH scheme. Thought this thread might be a chance to pool the knowledge on this subject.

How do you do it? If you buy out the clawback a few years after the original sale, is the clawback % still the one based on purchase price and the set market price at the time when you bought?

Also is there a minimum period you must wait after you buy the AH before you can buy out your clawback?

Anything useful ?

Message to administrator: please feel free to delete this thead as similar ones exist already. Thanks in advance.