Build recommendations

[Steve3730]

So after a year with our 4 gallon clawhammer still we're hook and know we need something bigger. We'd like to take time and do it right so I'm looking for recommendations. I have a plumber and engineer helping with constructing it and I work for a plumbing company so I have access to some great resources. We do mainly Whiskey and would like to do some Rums so thinking potstill is where we want to be.

For a boiler I'd like to use an old SS keg I have (15.5 gallons) and thinking I'd install a heating element and go that route so I can ditch the complete outdoor burner set up and be in my garage. I seen a set up with a drain at the bottom for ease of draining and recharge without breaking down for stripping runs so thinking of including that.

But column and head design i really don't know where to go. I've looked at the designs thread but I guess I don't know enough about them to make a decision on which is a better choice.

Thanks for the help!