Yep. I am suspecting air leakage somewhere. I had very limited time to troubleshoot it due to my work schedule and end of daylight. I hadn't really planned to fly it so soon. It was all on a whim. My other TDs have run really well but they have always utilized the stock tank. I'll get it sorted one way or another. I used mostly new parts on the engine and everything seemed to fit snuggly on assembly. We'll see. Those alum backolates look nice! I NEED some of those.