Uprooted
As you know, you will need to log all of the hours with an instructor. This may seem really unfair/academic/a bore. I was in that position when I first trained (fixed wing), as I had something like 1000 unlogged hours in "jollies" (with hindsight I wish I had logged them in the "any other flight" coloumn). What this did do for me was to allow me to find my PPL course (and subsequent training) a complete walk in the park. That is not to say I didn't learn anything, I learnt a hell of a lot, but my learning was already one step ahead (e.g. I was doing a lot of limited panel instrument work just to burn up hours to get my PPL), I have remained one step a head subsequently with all of my training and I can only thank all those who took me through the early years.
I think you will find that the IAA would need to have their instructor authorised by the FAA if instruction is to be in an aircraft on the November reg.
I hope all goes well for you, and wish you all the very best!
RIX