I would respectfully also add one additional automotive component test. Do I care if it fails? If the answer is yes, reconsider the level of redundancy in your design. Just about every individual component in my plane could fail without adding much stress or pilot workload. I would land and go to Autozone or Radio Shack and be on my way in a couple hours. Single point failures that would cause danger to the safety of flight are mostly of the Aviation certified type components (engine, prop). It would be interesting to have a list of what people have chosen from the automotive world. Some are probably a little timid in this forum. One area where I would not go automotive without very thorough research is in wiring. I used Tefzel throughout my plane considering fire/ toxic smoke danger. On the other hand, I've heard that "plenum wire" is also nontoxic when it burns. My 2 cents. Larry Henney360LH PS: Then of course we could discuss marine components (like a hydraulic pump for instance) :)