My experience similar to Ron's above. The guys new to gas struggled with that #4 ign. the most. Myself, I run my 20 on the fat side, and get all the power I'll ever need (including 3D demands) while running it on the fat side.

If you decide on a new module, your call, suggest you look into the RCXP module. It's the latest and greatest, the smallest, and sometimes least expensive (45-50.).

http://www.rcextremepower.net/ignitions.html