Do you have a V2 shoe or you planning to get one?
if you are planning to get one, you may as well wait and get a V3. it would save you a lot of work.
If you are doing the toebox, I recall someone else saying that they used some nail polish remover or acetone very thinly along the toebox edge to unglue it and it seemed to work.
that way you can peel off the entire toebox in one piece without any tears or damage to the rubber.
I think it was someone on here, not sure who, but that was a good idea they came up with rather than using a knife or cutting into the edge.