I already posted this in the quick question thread of the Guitar Gear board, but I am really trying to get some immediate help here.

So I just hopped on the Boss HM-2 Swedish chainsaw bandwagon and discovered the whole conundrum with the ACA 120 power adaptors. Every search I do leads me to discussions about modding it to use a regular 9V PSA adaptor, or the daisy chain method. I would prefer to just buy a separate adaptor, but I am so unsure which one to use. When I use the daisy chain method it works, but it gives me this high-pitched hum that I absolutely do not want. Can someone please forward me to the right adaptor to buy?