My 70" GP Revolver \ DLE 20 crashed last fall and I just got it back together and am flying it again, but the engine isn't running well. The DLE 20, which I've had for two years, is sputtering on the high end and occasionally just cutting during idle on the ground, before take-off, even when the idle sounds perfect (good low RPM, steady, and not slowing down from being too rich). I've been leaning the high end, but is still missing at WOT. Also the engine has died a couple of times while running at WOT. I just increased the NGK plug gap from .018 to .024 - seemed to help a bit, and then I started to re-tune the engine - still missing. Am wondering if this could be the EI, or the battery? Using NiMH, 4c, 2000mAh, charges to 5.6, was at 5.0 at the end of the day. I may have put the wrong EI back on this engine (I have a few spare on the bench). Or could it be the Hall sensor's not lined up right? Or should I just keep leaning the high end till the missing is gone? The only thing is the engine dying suddenly while at idle and also at WOT seems like a loss of spark, more than a fuel-rich or lean condition. Could it be that the EI doesn't like the battery charged up to 5.6v? Any ideas and \ or suggestions would be appreciated. Thanks.

Mike D