Things are working great. No drifting, and the ability to tune the grind finer has improved my shot quality quite a bit. The grinder is still easy to adjust too.
If there is any downside, it's only that since this is a modification, it gets the job done great but the button doesn't have the precise feel of something that was engineered from scratch to do what it's doing. Hope that makes sense! Lets put it this way, when you're not pressing the button you can still move the hopper with both hands. And when you do press the button there is still some resistance. But otherwise it does exactly what I wanted it to do. Plus, this mod is totally reversible, only costs about $3 and takes 10 minutes to do.
If anybody wants the exact spring and rubber gasket I used, email me at emailsucks98 (at) yahoo and we'll figure it out. As said, it's only about $3.
No photos, but below is a graphic depicting a side-view section of the parts.
A) Indexing button
B) Shaft pin
Addition parts required for modification:
E) Rubber gasket
F) Additional Spring
1) Remove all beans from grinder. Set grinder to "0" setting.
2) Remove the three flat-head screws from the finger-guard inside the hopper
3) Remove finger guard from hopper and lift hopper assembly from grinder.
4) The grinder indexing mechanism is now exposed inside the grinder. Push down on the metal pin while lifting up on the indexing button, inside the grinder. This will allow you to remove the indexing button.
5) Remove the shaft pin with e-clip. (you can leave the stock spring, part #D, in the hole within the grinder)
remove the e-clip from the shaft pin. The e-clip will not be re-used.
6) Put the shaft pin back in the grinder, but upside down, so the pointed end goes into the hole where the spring #D sits.
7) Slide the additional spring over the shaft pin. This will create additional upward pressure on the hopper.
8.) Press the rubber gasket into the top of the indexing button. Maybe some glue is a good idea.
9) Install the indexing button in it's original location.
10) re-install the hopper, finger guard and screws. You will have to push down on the hopper to compress the spring, as you thread the screws in through the finger guard.