ORIGINAL: jlkonn
'I should set the ATV on my Futaba to 140%?'

Right, 140%. If that's too much throw once you fly it, then you can reduce anywhere along the chain of TX adjustments. If it's way too much, lengthen control horn or come in on servo arm.

'Won't this increase the "anti-exponential" effect of the rotation of the servo arm?'

Assuming you use some expo, then yes, it will counter the expo, making the stick response more linear at the extreme end. If you don't like the feel, adjust expo in your TX.

'Do I enhance servo resolution by doing this.'

Absolutely. Maximum resolution requires maximum servo movement within the desired range of deflection, and maximum endpoint is what gets you there.

I'm with Dick on the extensions. I solder in whatever extra length I need. As to the usefulness of the math, I find it does help to give me some assurance on the initial set-up. I normally cut my own control horns out of phenolic sheet, so I like to have confidence that I am 'measuring twice, cutting once.' But the precision to three decimal places and all that is pure fluff once you start flying, trimming and adjusting linkages.