The guitar pick is interesting !!!! I have played for over 25 years..... I actually have a degree in classical guitar studies... you probably mentioned thickness pick what brand also ? to the others comments maybe I'll dial in a drop wider of a gap as I'm not convinced higher conversion as in my 85% eff is really nessasary there has got to be a reason for example why BYO , AHA, brew, Zymurgy all calculate their recipes to 70% mash eff. maybe it's they assume not every one has a mill and they are playing it safe.....at the same time I have beersmith formatted to expect a 85% conversion and beersmith is a PITA to change/dial in the program. IDK I was just vey disappointed to miss the OG on my last two batches that I expected though most guys in my HBC are shocked that I even strive for that high of an effeciencey. The other thing is my brewhouse eff is and I want it this way pretty low hovering 65% as I leave all ( or most ) trub and sediment behind which in my setup equates to about 1.5 gallons but I'm comfortable with that as long as I end up with 5.5 gallons in my carboy and I hit my gravity... that's where beersmith shines for me as it takes all the guess work out.