The
Edge rims I wanted to get on the Calfee Dragonfly I got coming, are limited to 28 holes. Edge holes are molded in the carbon, and so more cannot be drilled (like has been done to Zipps).
The wheelbuilders I talked to thought that 28 would be okay, but they used the more robust
DT Comp's instead of DT aerolites, and preferred the deeper 68 rims to the
45's.
We'll see how it works out.