I also have a PBL Resistance soldering unit, have had if for about 32 or 33 years now and it has been more than I need for most jobs. I highly recommend it. You can get it from the guys at PBL, they are a huge force behind Sn3 modeling, I believe that the letters stand for Peter Built Locomotive Works and they reside in Ukaiah California. They used to be in Chama, NM but health reasons forced them to move out West. Bill and Mary Ann Peter are terrific folks and they have an extremely talented and knowledgeable guy that is gradually taking over the business by the name of Jimmy Booth, he is terrific. I'm sorry, I don't have a link to post at this time.