As someone who has preferred up to 0.6" forward of the recommended CG, I'm interested to hear your thoughts after trying it. Are you postulating that it will offer better ground handling? I'll bet landings will be quite different though; not to mention flying in general but landing especially.

However, enough people have voiced their opinion of 4" being too tail heavy that I think I'll still at first try at least 0.25" forward of 4" CG.