On the fence about aquiring the lopresti zip tips. my wing tips have a big hole in them where the aileron weights swing down through. I'd like new tips that have a little more room over stock so that I maybe don't have to have big gaping holes in my wing tips. Also if I could pick up a knot or two, some extra light and maybe a shorter ground roll that'd all be a plus? anybody have the scoop on the Zip Tips?