maalox

With your weight you'll be able to do belly flying in your FS suit quite comfortably. The tunnel air spills down quite a bit if you hang around too close to the tunnel wall though, but it will be worth it from an FS point of view. You will also be able to backfly quite easily. In terms of anything faster (sits etc.) you would probably need to wear one of their baggy suits to make it work comfortably.