I've never read that you only need a Class II to do commercial training - can you clarify pressman?
I'm also going down the Deviation route - I've been told I need to obtain a PPL before being allowed to be examined to Class I RENEWAL limits (I have a Class II) and, assuming everything goes to plan, I'll be issued with a Class I (Deviation) allowing me to commence commercial training...but only on UK-registered a/c.
TB10Av8tor,
I'd be interested to hear of your experiences, medical-wise with regards to the Class I, if you don't mind of course. PM me if you like - it sounds like you're a little ahead of my position.
Cheers,
V1R