Fastest temp gauge

[jackrides]

Has anyone tried a 'laser' temp gun to monitor exhaust temp on the outside of the header near the head? Checked what difference 1 jet size makes? Tried turning the gun into a permanent mounted temp gauge (readout up top)? Thoughts on comparing to a AFR gauge?

[repherence2]

no, just the tried-and-true TTO cylinder head temperature gage (with remote extension wire for the temperature probe).