I'm in the process of an engine swap, and I need a reliable way of inverting the 5v cam sensor signal.I'd hate to be stranded somewhere because a few 20 cent parts failed.The posted schematic is what I've come up with, and my question is, is there anything any of you would add to help with the function or reliability of this circuit? maybe a 5.1v zener to protect the inputs? Perhaps a better circuit altogether? Thanks in advance