Hey John, I love these forums!! There very informative. Thank you for all the help and answers. My son and i talk about the same thing were building these so cheap make them bullet proof worry about the rest later. It seems like vibration is the killer. we've already lost screws on several occasions just in hover mode. Im probably going to order a couple of the HK401Bs just to try them. Thanks John, keep us informed were rookies at the choppers. Mike Scott, [email protected]