OK, so finally getting to providing an update on how things went for me...
My package from GoFast was delayed because of the mudslides in the southern part of the province (I live in the North). The great packaging job must be recognized, everything showed up nice and sound. High quality parts.
I cut with a 4inch angle grinder and zip disk the broken nipple off. When I did this I had knicked the smooth machined surface where the oil filters O ring seals.. Had to fill with JB weld, cured, then sanded smooth. (A little bit of THD fluid while sanding creates a very very smooth final product, I sanded with 180 Grit)
Drilled and tapped the hole, about an inch into the transmission housing. Coated the drill bit with grease, I would wipe off the shavings and grease and apply new grease every few turns.
I had installed the rescue kit nipple and not knowing that it was supposed to seated flush with the transmission, I put filter on and fired up tractor. Everything seemed fine for a couple hours, then eventually it started spewing fluid from behind the filter.
I had to cut a couple threads off the part going into the transmission body off of the nipple.
Re installed nipple, fired up and good to go.
Much thanks to GoFast, he was very helpful through out the whole process and was very easy to communicate with!
First picture is how it looked before cutting off a bit of the end of the nipple, and before Jb Welding the damaged part.
Second picture is final product.