Hello, I’ve a 100-120-140 TALAS on my 456. I almost always run it at 120, opening it up to 140 for the bigger downs, it makes me feel better and ride faster!
On really steep climbs I wind it down to 100, really helps keep the nose down.
However I was at Sherwood Pines yesterday, where I usually ride a Scandal with an 80mm travel corrected rigid fork. There the 456 felt sluggish by comparison, so I shortened the travel to 100 and it was loads better.
So, in conclusion for tight twisty singletrack a 456 is fantastic with a 100 fork.
Hope that helps
APF