Upgraded my Mazzer Mini burrs to genuine Mazzer Super Jolly 33M burrs and I am happy with the change dosing a lot quicker after recalibrating and a slight more sweeter flavour coming through in the cappuccino its noticeable just a little but you only get supple changes in upgrades paired with my ECM Mechanitka IV full size.
Next is ECM flow control device very hard to get most out of stock or way over priced.