I stand corrected! :~)
I didn't realise the C3 Venoms could be purchased as a US fin box. I have Venoms for my two Futura's (111 & 93) and love these fins - best I've had. I still think the choice of decent "speed" fins for the Kodes is rather limited but it's good to see there is at least some choice. Personally I'd like to see the K86 and above with a PB fin system for a more secure fit and larger fin selection.
Either way, I'm sure you'll enjoy the K86 Claus.