Ok, I've been doing my own setups on my Instruments. And been having great results. Now I've been using a cheap clip-on and one that's built into my multi-effect pedal. I'm wondering since my intentions are once i finish guitar tech classes to branch out to doing it for others. I want to invest in a good quality tuner for doing this. I've been collecting old guitars and setting them up to various tunings. I've been told it's best to use a clip-on because it cuts out RF interference. So, my question is, is that accurate information? If not is there a decent quality tuner I should look in to. My plan is to get a multi-meter and stuff. I've already got an AS degree in computer and electronics engineering. Ive got good soldering equipment and stuff.