Lookin' good.
There is no 'right' answer. I'd suggest doing some initial tillering before flipping the tips.
Say get the it to pull back about 4-5" (using a long string), but at your final target weight? That way you'll be able to see how it is bending near that knot.
Once you have it back that far, everything starts happening a bit quick, so it's a good point to stop and do some thinking anyway!
Out of interest, I'd have tried to get that centre line running straight down both limbs (or as near as possible) to avoid the bow trying to twist in the hand, mind you a lottle offset like that can give you a near centre shot, and as the bow comes back it will tend to sort itself out.
Have fun, it's good to have a little helper, mine came field shooting with me yesterday, she's as big as me now and was shooting one of my 40lb Hazel bows
Good luck, that's a pretty looking stave.
Del