Did vinegar and sac cleaning run with my new 2" reflux still today.
All went really well, found a couple of pinhole leaks during vinegar steam rum which were swiftly rectified.
Then onto cleaning run.
I know CM stills are like the dole bludger cousin of VM and LM stills. But I like mine, it has a 1 m tall packed column with stainless steel wool into 200mm shotgun RC (4x1/2 inch internal) into 300mm shotgun PC. (Everything 2" external)
It runs pretty good although quite touchy. It can almost achieve full reflux with all four rings going on my gas burner and does it no worries with 3 rings.
Pulled 93% abv