Well, all 3 of my pedals are definitely tip ringed positive. I know, now, that the 24V Worm will have to be plugged into a strip off my Power pad2 supply(MXR), but is there any way a 9V wall wart supplied by EHX that’s tip ringed positive can be made into or adjusted via a cord/coupler/whatever?? into a tip ring negative power supply without doing irreparable harm to the pedals?? Thanks for any advice, tips or suggestions you knowledgeable users out there might help me with. My small clone chorus and Deluxe Electric Mistress are the other 2 tip ringed positive EHX pedals I use. Everything else (8 pedals in total) are all 9V tip ring – so no problems there. It’d be nice to hear from the pro’s at EHX too on this matter!!!!!!!!!!!!!!Dickey58 pro-fiddler with The Dixie Highway Band.