What are the frequency centres on the high and low shelf EQs? Are the fairly wide in slope like a Bandaxall style or relatively narrower like a console style eq?
In terms of testing the intonation elsewhere on the fingerboard the intonation varies so much by finger position (tip vs flesh) lines don't make much of a difference.
I still love them though, they make me fee safe.
If you're setting intonation by the 12th fret position you shouldn't need dots or lines. Just "fret" the position where you'd play the octave harmonic.