Hallo Tim making the rig taller depends on many things,
Has the boat been widened ( you do not want a tippy cat )
What happened with the weight compared with the 44?
You have bought the sail away plug
, there is nothing wrong with that but they are normally heavier than the later produced boats.
Knysna yachts are good builders but not light weight builders since the bought the moulds from Duncan Lethbridge the boat has had a substantial weight increase and to offset this more sail will help but be carefull since you do not want to step over a safe line, I also understand that the bridgdeck height is raised or almost double so the centre of gravity has also gone up another reasoin to be careful with more sail especcially at the top, it might be a better idea to lenghten the boom if possible.
It helps keeping your leverage down.
Discuus it with the designer Angelo Lavranos he can tell you what to do and is very email@example.com
Make sure once you get your cat to keep it light the hulls are slim and the design cannot carry a big load.