There might be an expert here, but that's sort of like trying to find something healthy at McDonald's. It can be done, but you're really looking in the wrong place. The place to look for AviSynth help is the dedicated AviSynth help sub-forum over on Doom9, at www.doom9.org. That's where the guy who wrote LimitedSharpen hangs out, so it's the best place to look for help.