[richarddbarker]

I've also got the 200gram otter undersuit, they are very warm. Unfortuantely they do seem to add quite a bit to your bouyancy due to their thickness. I've found I use 9kg in fresh and 12kg in salt, with a similar config to what you've mentioned.

Quite a few members of my club use the RoHo thermocline thingy and they are much thinner = less bouyant = less lead. But they aren't cheap and a few still swap to a thicker suit for the winter season.

Chances are if your too floaty with a full tank at the start of the dive then your going to be looking at another couple of kg at least. This should then give you enough weight for the end of the dive, ensuring a controlled ascent. Guess you'll have to do some bouyancy checks with different amounts of air in your tanks and see how you get on.

You will probably find you can shed some weight as you get used to your new equipment, I know I did.

Hope this is useful.