Hi,
I did actually. Got it in the heat of the moment while a friend gave me a call "Guess what, I'm in the Sadowsky shop, right now!! what do you want?" (Well, I wanted the Will Lee bass that was available...) so I decide to try the drop D tuner, and a couple of 500K pots.
It's a perfect fit, took only 5 minuets to install. Very smooth and accurate, great quality of course.
While Hipshot state you can use a 0.105 E string with no problem I found it's hard to keep a totally straight neck if you want a buzz free D string. I think you'd have to be more picky choosing the right strings. A student of mine is using the Hipshot HB1 on a Stingray and he had to switch to 0.110 E to add more tension. Another (expected) downside is the added weight to the neck. After a couple of days I decided It's not going to see enough use to justify all this so I took it off. Still, If you think you'll use it it's a great upgrade.
Haven't gotten to install the pots yet...
Ronen