@kereru If FedEx doesn't let me down, the OCK-2 will arrive tomorrow. My plan is to connect it to both the U18 and R26 as you suggested.
Stupid question of the day... if I connect my cd player to my R26 using a coaxial digital connection, the clock will benefit that connection as well as the i2s connection, correct? I typically use the dac built into my Denon DCD-1700NE because it actually sounds good. I figure I'll try connecting to the dac again with the addition of the clock. The U18 doesn't have a coaxial input, so I can't go through it.