An easy mod for the HBS stills.

Most of the HBS stills work on a cooling management system whereby you must regulate the water flow to adjust temperatures.
The problem with these is that even a minor change in water pressure can affect the operation.
Unless the household supply is rock steady, a toilet flushing, washing machine filling or a tap being run elsewhere in the house will cause a drop in pressure - many a shower user will have felt the consequences of that.

I came up with an easy solution.