Home Distiller

I've just fired this still up to make my own ethanol fuel.
I've been running E85 in my boat for several years.
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It made 1800 hp on E85.

I got the still up to temp and operated it for an hour or so.
There was a significant amount of steam coming out the runoff vent from the bottom bubbler section.

I got 90% ethanol out of the top condenser section and 67% ethanol out of the runoff section.

I followed the plans closely and don't know where I screwed up.
A lot of the ethanol steam that should be going up the column is coming from the runoff vent that comes from the very bottom of the still.
Should I restrict the runoff line down to 1/4" ?

I have the automatic water valve and it seems to be working fine. It cycles on and off at 173 *

I have a unique situation with my mash solution as it has already been distilled to 50% by a local farmer that makes it from waste beer.
I have 100 gallons of that 50% solution in a 200 gallon stainless tank.

I made this still a year ago and polished it all up and up until now it was just a conversation piece,


Thanks for any input.
Mark