Got out of work early and was looking forward to trying out the new wheelset. Unfortunately for me, it didn't happen because my campy-compatible Recon cassette wouldn't fit on 3T's "multi-sys" freehub. Apparently, the construction of Recon's 11 speed cassette is the reason why it won't fit. The additional guides inside the Recon cassette hits against the shim/sram splines on 3T's freehub body.

Recon-Campagnolo 11 speed cassette


Campagnolo OEM 11-speed cassette