Looks cool but it doesn't look like a sketch but rather a celshaded rendering with an effect to make it have less colors.
That plugin was made to simulate a post production effect that gives it a real sketch, water color or whatever look. The post production trick used a dry brush plugin (that is the most imortant part) which this plugin doesn't do so it can't create resaults that are nearly as nice.
I also don't think the edges look that great, I'd rather use lightwaves edges than that.
The model is pritty cool. So I think you should forget about the plugin, keep the celshading and add better edges.
That plugin wasn't meant to be applied to celshaded images (even though it can).
But it is nice to have anyway.