This is a combo I am looking forward to trying out.  Velocity's Dually 29+ rim laced to a Borealis rear hub and a Sram front hub.  The idea is to try to make 29x3 Knard tires fit into an off the shelf Rock Shox Revelation fork.  So far we have it just barely clearing after doing some filing on the bottom of the forks arch.  This obviously is sketchy at best and is best not to try it yourself but curiosity got the best of us on this one.

The rims themselves built up great and were extremely round/true and to top it off, they let you set up your 29+ bike tubeless as easy as any other quality tubeless system on the market.  We simply used one layer of Gorilla tape to seal the spoke holes and an Orange Seal valve and everything went as smooth as could be.  I am really hoping I get to work with these rims more in the future.