also keen to have one for the odd occasion I change bar/stem in the future
I suppose I’m looking for the highly recommended bargain that has been measured as accurate
At some point you just know by feel … and/or ignore because you lubed differently or despite the recommended setting it twists in the stem… accurate is a bit irrelevant unless you are using the exact lube. (bear in mind stem bolts may come with blue loctite) and the rotational torque is not what you’re interested in but the actual force put on the bars that depends on the stem lubrication and the carbon paste.
Same goes for brakes… you don’t want to go OVER the torque on carbon bars but equally you don’t want to do them up too tight to rotate in a crash…
Add to which as cxmonkey say’s down the line they need recalibrating.
you also need to remember to store properly … I’m aware of it but have ended up not resetting prior to storage so if only used occasionally then that’s an added way accuracy degrades.
Just test them every so often which assuming you have a vice and weights is only a 10 min job for non aerospace (bike) stuff (due too all of the above)