Just an update on my experience
So FINALLY got to go to Sinai .. When I originally wrote this I had 30 dives, I now have nearly double that .. There is a lot to say about experience ..
What I have learned is that you need to do whatever you need to do, especially at the beginning and trial and error worked fine for me. I do need 20lbs, partly because of my suit (2pc 5.5mm) and partly because I have a small frame with little bone weight and no muscle. In my sort of shorty I dived with 12, I could manage, but I would probably prefer to take 14, with experience I am sure 12 would be fine. The 20 in my full gear I doubt I will change to 18, but to be honest, I am so suprised about how the distribution and experience can change the weights already .. I will wait and see.
ANYWAY 2x10 is not an option for me, it is very uncomfortable, leaves severe brusing and is distributed so badly that it is not so easy to move in the water. 2x8 and 2x6 on my hips is a little better and a little more again, but still .. distribution not great, and less comfortable .. Ideally 3x4 on my weight belt and 2x4 in pockets .. Its comfortable, the belt does spin round, I find it easy to move and I swim vertically most of the time without trying. When my BCD gets a little older, the strap will be more flexible so I will try to take 1x4 off my belt and onto my tank - just for comfort for my back. My feet DO NOT RISE anymore, I never used ankle weights, but my fins are heavy rubber .. I can not explain why my feet stopped rising, but I imagine the weight changes throughout just sorted out the problem, I am ready to change my fins to more speed (suggestons welcome, but maybe its the wrong forum for that discussion). My BCD is the Mares DragonFly .. it holds air at the top and the release is too low to empty it, so I have learned to either go upsidedown to release it all or just lean back further (maybe to 45degrees). That was a big problem in shallow waters, especially at the end of a dive when my tank was lighter.
Anyway, maybe it helps someone