I think the screw is probably the least of the issues. There are a few other factors.Originally Posted by 49464F59230 link=1252382883/0#0 date=1252382883
-Wide temperature band
-Low shower screen makes it more sensitive to dosing
-No pre-infusion/pressure ramp up makes it more prone to channeling
-Small factory baskets mean that there is less margin for error for a drinkable shot.
- The reputation probably gained more traction when Silvia used to ship with a 12 bar opv, This isnt the case anymore but the reputation persists.
The best advice is to get bigger baskets as this will also help with the low shower screen.
Do a search on temp surfing there is lots of information.
Hope this helps.