Hi there and welcome! It looks like you've had quite an adventure today!!! I'm so glad people were here to help.
I don't come out to this Main Forum very often. Most of the time I'm hiding out over in the Prozinc forum. If you'd like to post there, we would be happy to help you sort out the dosing for your kitty! I'm so glad you are changing healthy, low-carb wet food, and that you are home testing to keep Stewie safe! It's a lot to learn all at once, but it sounds like you are doing well.
I'd recommend getting our spreadsheet set up so you have somewhere to keep all of the numbers you are getting. And you'll find it an incredibly valuable tool in sorting out dosing. Here is a link to the directions for getting started.
http://www.felinediabetes.com/FDMB/threads/fdmb-spreadsheet-instructions.130337/ If you run into any trouble just ask and someone can help you with it.
We look forward to seeing you over in Prozinc when you're ready!