Congrats on the new toy Wendy, and what Phill said goes for me too! <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />
In addition see if you can pressure test your mast for leaks and search this forum for how best to solve those leaks that you'll inevitably find.
Even a pint of water sitting in the top of your mast when capsized takes a hell of a lot of effort to lift. (No doubt some of our more geeky forum members will provide us with an exact calc of effort required for a 4.3 with a pint of water in the mast <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />)