Now before I continue lets get the boring legal stuff out of the way....
Check the laws in your local area, some places you cant even own a still let alone use it to make a drinkable product, check it out first. I know in New Zealand you can make your own booze and in the UK you can have a still that makes up to 5L if you have a permit.
ok lets carry on, so why am i making another keg still if I already have one? well its turns out that even in pot still mode the reflux still does not give enough flavour on the spirit, it strips it out due to refluxing too much. When you want to make rum and gin and other flavoured spirits you need a Pot Still as a reflux still will just strip out the flavours.
Now it is worth having a column for the reflux still as you can use this to make vodka which can be used to make gin in your pot still later on. I have both a pot still column and a reflux column now and they both fit on the same boiler, Now I will be repeating the boiler making process as some people may be reading this and have not seen the original instructable so I have to assume they don't have a boiler yet.