I fence few months and have confusion over hand position during attack using the french grip. Classical books on fencing saying that the sword arm should rotate from partial supination to complete supination with the thumb at 3 o'clock. My coach at fencing club told me that it is better to keep the thumb at 1 o'clock. I have just talked to the coach of another club (on this subject) I am going to join and he said to me that classical approach is outdated completely and I should not compete at all if I am going to follow it. In adiditon I've found multiple discussions here trashing classical approach to fencing. So here you are my question(s):
1. Is olympic approach so diffirent that classical foundation does not matter at all any more even if a fencer uses french grip (not pistol grip)?
2. The coach from the new club referenced before 1950 fencing school as historical fencing. Is modern fencing dead and all knowledge build/collected last 400 years is empty jar of outdated knowledge?
3. And the main question at last: Should I rotate my hand to complete supination with the thumb at 3 o'clock when I attack using french grip?
All answers and opinions are higly appreciated.