Have to modify somethings but it should be awesome when it is done. It looks like it can hold 50 gallons but is sectional so I can adjust for size as needed.
I'd use 1.5'' or 2'' for the dump tc. 1'' would be fine for the racking port. I'd give at least a half gallon of space below the racking port. I have about a quart below mine, which holds 22gal total, and it's not quite enough. Nice work!