Hi guys. I finally received my b-drive from Swell. It came with a powersupply which (off course) is incompatible with European power. I have had an ac adaptor installed under my pedalboard now, but I don't know if it needs to have Center negative or Center positive. Usually it is pictured on the original powersupply that comes with pedals, but not on this one unfortunately. I can't even measure the original since there's no way to get power through it here. To make matters worse, swell has gone belly up, and the owner is absolutely impossible to get in contact with. So do any of you swell users know wether it should have a negative Center og a positive?