>Gotta take you to task on the internal reflux cooling coil being
>inferior to the nixon-stone setup. This not need to be the case has i
>have proved for myself with 95% being my normal return.
>A sufficently long internal coiled condensor, mine is about 1.6m
>linear length, coiled to about 300mm long 6mm copper with the top
>centre closed off so that all vapor goes over the tubing. This has
>proved very efficient.
Good point - the critical bit is to ensure that it is large enough to do
the job - eg total reflux when required . Many that I've seen are only a
couple of coils - far too small.