I recently got a DSL15H and cabinet setup second hand. The original owner lost the footswitch it came with and I was looking to replace it. I can see on the product page in the archives that it came with PEDL-00003. I was able to find a single button marshall switch used online, but it looks like the PEDL-00001. It seems to work somewhat except the channel doesn't actually switch then pressed. It stays on the clean channel no matter what I do. Is the PEDL-00003 the only compatible Marshall FS pedal for this DSL15H amp?