I'm contemplating adding Stealth like foils to the rudders of my F18HT. Can anyone offer ballpark dimensions of those foils, and maybe sources for foils or fabrication ideas. I'm also wondering about the angle of attack of the foils. Are they parallel to the waterline? Or other reference? Anyone else done something like this? Is my best bet to save up a bunch of $s and buy a complete set up from John?
Thanks!

Dave