I agree with the above poster.
I tried my onespot and supplies from johnny shredfreak and found the same results…
An Eventide stomp on it's own = good, no noise all good!
An eventide stomp + anyother pedals = bad, works but background noise is too much.
there is a thread about power supplies already, i would read the whole thread before buying as there are options floated, then tested and found not to work.