I play with my fingers and use my pinky for position and prefer to play just in front of the bridge pup mostly. My pinky touches the volume pot, drives me nuts.
It's
NOT a
Tele!!! Your trying to make it sound like a Tele, probably because your used to that sound, let it sound like a
Strat!!!
Ed, I know you know your way around a git-tar by now but, I think you have to move forward just a little bit. I play just behind the middle PUP mostly, some just in front of the middle PUP. My pinky anchors just in front of the volume control, often touching/hanging on the high E string. And the back side of my pinky often just touches the volume knob, but it doesn't change the setting.
And you want the volume control where it is for volume swells. Leo got that right.

(Rory Gallagher was 1 of the best at this, goes without saying Jeff Beck too.)
I often will start a low open E string run just in front of or just behind the bridge PUP and as I go to the higher strings I move my picking forward. Keeps the low string notes tighter/less mud and as you go forward the higher strings fatten up. It keeps the run more balanced sounding.
To me I've thought for a long time now, that the PUPs on a Strat
should have been angled towards the bridge on the low E side and towards the neck on the hi E side. Opposite of how they really are. (Weren't the PUP's like that on Jimmi's and Otis Rush's upside down Strat's?

Didn't some old Supros (?) have their PUP's set like that?)
I
do play just in front of the bridge PUP or just behind it for a lead or to rake a cord on an up stroke for chime, but only sometimes, but just for
effect. It's very tight and thinner sounding there, not a normal Strat tone. (Or on any guitar for that matter.) The tone doesn't sound very natural picking there, but it's very useful for accents on certain parts. Anson Funderberg plays solos or parts of them very close to the bridge PUP on his Start but he plays through a vintage tweed bassman, harder to do with brighter amps.
Same goes for Gretsch players. They will play a few notes just above/on top of the bridge PUP on the low E string for that very tight low sound, but it's just for effect.