I don't know if there is officially a new version. Version 1 to 2 had a few big changes including the regulator and the tank storage. That post was the first I had heard about another change. Not sure the change is big enough to a new version.
I did 4 mods on mine:
stainless steel washers under the stone (not sure they do much but mods don't get much easier).
The thrust bearing (I had a hard time getting it right and had the buy a tool. It looks like it helps but I'm not sure it would work on your oven.
The Chauflector. I used the end of a cheap spatula. Just broke off the handle. I've made pizza with and without the deflector installed and preferred it with the deflector.
Reverse the power wires. There are a few ways to do it. I cut the wires and spliced them. This changes the rotation direction of the stone. If it is turning counter clockwise, you can see the crust before it goes past the flame. I like being able to do that a lot. I've read that you can be less invasive by putting batteries in backwards but I never tried it.