minimum height on outlet boxes I believe is 18 inches in a garage because of gas vapors. My code book is at work but I can provide code reference later
stray harmonics or high frequency resonance from another source can mess with household grade electronics. Anybody in the neighborhood using a square wave tig?
I have had mine for 20 + years. Setup is critical but stays well when set.
I agree with the need for a better fence. Any aftermarket fence would be better.