The threads on these have finicky machining. People (myself included) have had trouble with certain handles not fitting. The threads on the post are very long, so your handle would need to be tapped deep enough to accept it. The rough threads on the post could also be cleaned up with a thread chaser.
That aside, it is an amazing shaver and well worth the firesale price. I definitely plan to buy another when the machining bugs are ironed out.
Mine on a MR5 style head:
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