+1. After this, ive always only tuned to smoke/noise-pitch/performance

IMHO unless you really are at the top of your game where only the best will do, anything like a $270 temp gun is just a frivolous waste of coin - you're kidding yourself if you think you absolutely need such a piece of equipment. Cheaper options will achieve a similar desired result, but horses for courses.

My $12 ebay IR temp gun is accurate enough to be within 3 degrees celcius when compared to work's fluke gun. Good enough for me to have a rough ballpark figure (these are toys cars - not F1 cars).