I use my (Dutch) Burkey Flatliner to power both the Time and Mod – with no noise at all.

Here's how: I run each pedal off three of the 9 VDC/200 mA isolated outlets in parallel – which gives the pedals 600 mA each, and which is clearly enough. Despite ten other pedals on the board there isn't even a hint of hiss or ground hum.

Seems like "isolated ground" should be the mantra here.