I have a VM still (copper)
It is packed with stainless steel scrubbers up to 1300cm.
The column is 2 inches
The boiler is charged with 25 litres @ 40%
The element is voltage controlled but is 2kw flat out
I am getting 96% flat out with a rate of 200 mls an hour !!!!
There is no flooding and the needle valve is fully open
Cooling water is at 55-60 degrees but i'm in Indonesia and tap water is 30 degrees to start.
Is it just a case of overpacking?