Hey Greg, that Pro Mark 3000 looks like a useful tool, do you sell those?
Well, obviously you've gone the transmission route, and that will work, so keep up the good work you're doing. One nice thing is that you have unbolted the tranny floor cover. When putting the tranny back in, you can span the hole with the Pro Mark 3000, and use ratchet straps to safely hold the tranny from above.
Good luck with the seal, and the hunting at the pick a part.