Yes, I too am surprised that you seem to be having high water two hours after we have a low.... but that's what the Almanacs seem to say happens.... (even my year 2000 one!). Probably the shape of the Isle of Wight or something!
Anyway, I am reliably informed that low water in Lymington is 06:13 BST on the Friday morning and it probably won't be possible to launch then.... even if I did get up early enough! Two hours later should be OK. There are other places, but its not just a question of a launch. There is also a need to park the car and trailer where it won't get towed, ticketed, nicked or vandalised. That limits the options. Calshot for example would be a possibility but the office there doesn't open till 08:30, so we can't get parking tickets etc till then. By then Lymington should be OK.
Its no big deal, please don't read too much into this, I just don't want everyone to be ready to go at 7 and then find those of us launching on the Friday morning will be keeping them waiting. Basically from where I'm sitting, 9am is do-able, 7 isn't easily, unless launching is the day before, (and you havenít got nearly a two hour drive to get there!) But as you say, aiming for 9 means it'll probably be 10. I'm quite happy to aim for 7 if you don't mind me being late!
PS... I think you're doing a grand job - really!
PPS Off to work now, so I'll look forward to some repies by tonight!