My Pot Still Plans with Thumper

[Moonshiner 67]

I have made a few modifications to the easy pot still design from the parent site in order to add a thumper keg. I designed it this way because i don't want to modify the keg in any way. Please let me know what you think about it and feel free to critique. I have already purchased most of the materials but wanted a second opinion before I started soldering. My main concern is about where to put the unions and also the distance between the boiler keg and thumper keg