I usually find something that I'd like to change, but for the most part I've used the hardware that comes with ARFs. For example, I didn't replace anything in my Kyosho Majestic but did replace the control linkages and the rudder control horn on my UCD. I don't think I'll be replacing the hardware that will come with my Comp-Arf Extra, but then again I definitely paid enough to get decent hardware with it.