Well done Fergus, shows what you can do with determination and a plan.
Swimmer, you need to be very careful as Fergus said: loads of testing as you reduce dose gradually in line with (presumably) carb reduction and see how you go. I would say have a word with the Doc first, to get him onside and make sure there are no other factors in your case making it impractical. Wether it works or not will depend on the degree to which your pancreas is already compromised. I've not done it as I've never been on insulin, but I'm sure there will be people like Fergus around to answer specific queries as you go.
Good luck!