I'm getting to the point where I need to make a decision on this subject. I'm very interested in the controls available from www.humpyard.com. They look and work great from everything I'm told. I've searched this topic but I'm not having any luck finding modelers who've posted complete tutorials online on how to build them from scratch... switches, levers, linkage, etc. I'd like to build them myself if possible, without having to reinvent the wheel. If anyone has a good link, please post it here. I will also be willing to post a tutorial on how I built my controls if I end up building a reliable and inexpensive alternative.