I received my Off Ramp 5 (Turboed and I2S Hynes Reg) yesterday and had it up and working in about 10 minutes with my Audio GD Master 7. I built my own short I2S cable from CAT 5 with the pinouts above and works OK. I'll be exploring other cable options down the road when my pocketbook recovers!
And notice an immediate difference in sound that is profound. Much less sibilance, less smear, and better imaging compared to the Master 7's USB32 interface. And even sounds better than the Audiophilleo 1 + PP which is really good with the TI DIR9001 SPDIF receiver chip on Input #1. And yes cymbals, bells, etc. do sound better with the Off Ramp and is further improving with a little run in time. Finally a great DAC made even better! Winner so far!