70$ for this 3/4in torque adapter I "checked" its calibration in a vice with some dead weight on a breaker bar and it was right on.
Those planetary drive things are cool, but 450ftlbs with a 3/4" breaker bar is pretty manageable, a short piece of cheap black oxide pipe as an extension depending on your strength.
I do watch the torque test channel religiously, guy is hilarious and basically has my dream job.