I've gone with a simpler approach and so far so good. We're 30 minutes into the first leak test and there is nary a leak to be found.
This is just an initial test so I'm going to make it a bit nicer before I'm done. Once I'm sure that everything will work I'll detail my parts in case anyone else is interested.
In the end I'll fit a hose onto the "out" barb and be able to easily and quietly train the MLT into my pot for the boil.