[Fixittt]

utabintarbo

This may sound like a smart a$$ answer, but I beleive that you already know. If you have ever milled copper, or like material you know that very thin walls + high RPM endmills= broken parts

But there are many different ways to achevie the desired wall thickness. Granted you dont want them to be paper thin. But if your wanting to make very thin walls, that is going to increase the machining time alot. You will have to make alot of really shallow passes so you dont break the wall.