Swap freehub on 2010 reynolds assaults from 11 campy 2 shima

[Bantamben]

I've been riding campy 11 speed on my 2010 reynolds assault hubs coa about a year now. I just decided to try out dura ace 9000 and its on its way. Anyone swapped the freehub on these wheels from 11 campy to 11 shimano. What was the cost? And how easy was it. I do all my own bike work.
Thanks

[Bantamben]

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