You know I've had this Santos commercial espresso grinder (killer grinder BTW... very quiet, well made). I bought it about 5 years ago from a high school ..... anyway, when I bought it I looked at the burrs and they look to bad and it ground espresso pretty good but a little slow. I always attributed the speed, or lack there-of to the quietness of the grinder.
I had been looking for burrs for a few years and the only place that carried them was Cafeparts, but they were $110 and 120 day lead time.... so back in July I finally ordered new burrs... and waited... 3 months later I emailed Cafeparts asking where my burrs were... they said sorry but those were no longer available..... but they had a new supplier and they were $30.... happy dance.
Weill in installed the new burrs last night and dialed in the grinder this morning..... wow is all I can say... a whole new espresso path...... fluffy, consistent grind and I'm about 4 or 5 steps from where the old burrs were.
The extraction was amazing this morning...... looking forward to more shots.
Oh, I found that an impact drill is a great way to remove the burr screws..... if you have one try it next time, or borrow or buy one.