Sparky, good to see you posting buddy!
Couple questions cliff. Way the 152 bath?. Couldn't you just take to 152 in the mak?.
You could, but they have a tendency to dry out if you take them all the way to 152° in the smoker. The hot water poach keeps them plump.
What would happen if you ran it threw the grinder on fine for a third time?.
I don't think it would make much difference, and you might risk starting to warm the meat. It's better to do the two grinds, then get it back in the fridge to stay cool until ready to stuff.