I talked to Joe today about the upgrades. I ordered a stage IV about a month ago and Joe told me to wait for these upgrades as they would be leaps ahead of the stage IV.
After talking to Joe today, I am glad I waited as there are a lot of great improvements. The only bad thing is that you have to have access to a Tech II to install the "stage V" (Joe actually called it a stage 7.5) assembly because of all the additions and changes to the transmission and programming. He said it takes about 1.5-2 hours of driving to slow learn the transmission, after the Tech II is used to fast learn the transmission. And this has to be done BEFORE you can use the truck! Needless to say, it's not something you can do by yourself (unless you have a couple thousand for a Tech II) anymore.
I recommend anyone considering a performance transmission in the future to call Joe as their site doesn't even start to cover what they have to offer now.
I can't wait to get the transmission as I have a NOS bottle sitting in the truck waiting to be turned on!