I have a X1SG Mamba and its been givig me headaches since day1. Cant even hold a tune and after abt 3gallons thru it, it seems to lose its pinch. Still the same after trying it with the ODO 97 glow plug. The manual says that the default setting of the LSN is 2.5 turns out from closed. But I find that its seems to be on the lean side. Using Byron 25% and Axe 2050 pipe that comes with it. Engine has been in the store as I have totally give up on it!