UPDATE 2: Everything Has Been Pulled From the Leaf
Well, that was surprisingly quick and easy, but with just 3 hours of work both the transaxle and the battery pack have been removed from the Leaf.
I had to pull both front tires to get at the driveshafts, but after that it was pretty smooth sailing. After disconnecting the harness and the connection to the battery pack, the engine came right off the engine mounts really cleanly. Right now, the whole unit is sitting on a furniture dolly until I can get it up to the GL on Saturday
With the motor out, we used the hoist to get the car as high up on the jacks as possible. After then removing the aerodynamic paneling under the car, we then used a couple more dollys on floor jacks to hold up the traction battery while we undid the bolts holding it to the chassis. from there it was easy to lower it to the ground and roll it out
When we rolled it out, there was maybe 3-4mm of space between the top of the pack and the bottom of the car, but it didn't catch on anything thankfully. With the pack removed, the easy part was over, mostly due to the thick rubber seal which surrounds the whole of the steel casing which holds the battery together.
After copious use of a heat gun, several blades, and a completely ruined outer shell, I was able to get access to all the battery cells inside. PLEASE NOTE that this was extremely unsafe and I would not recommend doing any of this without proper safety equipment and expertise. That being said, the battery has been taken apart and now I've got it stored until I can get it into the other car.