I have an Engl Screamer 50 combo that I bought while living in Europe a few years ago. I would like to have it modded for US voltage. I've tried contacting Engl before regarding a replacement transformer but didn't have any luck with them. I've been using a step up transformer, but may want to sell the amp and assume it would be tough to unload without this mod. I live in the DC metro area in case anyone can recommend a reliable tech to do the work. Any suggestions? Thanks!