It may literally be the single oldest Strat mod on the books!
I think the way Strats should have always been wired is with a master volume and a tone for each pickup. But Fender only wanted to use three pots, I guess.
I posted this the other day (maybe yesterday), about possible mods to which pot does what on a Strat:
A. Sacrifice tone control for either the middle or the neck in order to give it to the bridge.
B. Have the bridge pickup share a tone control with the middle pickup.
C. Wire all three pickups through a master tone control, and leave a dummy pot there (or wire the extra pot to be a separate volume control for one or two of the pickups).
D. Sacrifice the volume control in order to have a tone control for each pickup.
E. Replace one of your pots with a stacked pot, so you have four pots in three holes. This gives you a master volume and a tone for each pickup individually.