I made the quad exit for as an experiment for looks not performance. I've since removed them as it was louder than I wanted it to be although the sound was wicked.
Erik's done 2 motors for me and although he was slow as molasses, he was always honest and straight with me and delivered a good product. I'm sorry about your experience, but besides complaints of his lack of communication, or time to deliver an engine, this is the first time I've heard him accused of being a thief. The fact that you originally bought your engine through a reseller further clouds the picture. He is the most highly regarded LS engine builder IMO, and his skills are very respected industry wide. Is he without fault? No.
Erik is a vendor on LS1tech, and you can post your bad experience there in the vendor feedback section if you haven't done so already.
I'm not sure what to make of your name change comment and including it with your words about your unfortunate engine experience.
If you have something to say to me, you have my phone#, my personal email, and PM. I'm happy to talk to you any time. Otherwise keep the innuendos to yourself and your accusations out of my threads.