Hi all,

Please excuse my ignorance, but I wanted to consult you experts to get some info in-hand before approaching my LBS. I've been doing a ton of reading, but there are a number of things I am still a little unsure about.

I am thinking about changing to a Di2 on my CD0.1. I think it's about time. And then when I get a new bike in a couple years I already have it and can just transfer to a new frame. I currently have stock Vision TriMax cranks and chainrings. I also run a Shimano 10 speed rear cassette. I use Reynolds 66 race wheels and Shimano R500's for training.

My questions:

1. If I'm changing I should just go to 11 speed, right? There's no good reason to keep 10 speed other than to save some money with my current chain and cassette? Do I even have a choice?

2. And I can fit the 11 speed cassette on my current 10 speed wheels, right?

3. I have to change out my chain rings. The Di2 only works with a Shimano group set, right?

4. I would need a BB30 compatible set. Does that limit my ability to transfer this to a new frame in the future? Will I be limited to a BB30?

5. Which Di2? I figured Ultegra is just fine for me, especially because I ride mostly flats.

6. Am I forgetting anything?

Thank you all very much!
Mike