Thanks again Rob and John for the advise and the reassurance. My reluctance to work on things comes from a mindset of [if I break it, I'll only be making it worse. I'd rather it work nominally than not at all]. I'd like to generate some mechanical skill, so I've got to start somewhere. Like John though, I don't plan to do any power mods. Changing tires and fixing things that break are skills I need to develop.