Hi Damien
There are many 95kg + skippers on cat-rigged mozzies who are very competitive, both in the heavy airs (naturally) and also in the light stuff.
It has been my observations that much of it comes down to the sail, so just be prepared to have to get a new sail to suit your weight. Generally, I have observed that a radially-cut sail tends to favour the lighter crews, while a cross-cut sail will respond more favourably with heavier crews. If you order a sail, ensure that the sail-maker knows your weight. He will then cut the sail with much more fullness in it to take maximum advantage of your natural righting moment!
Cheers