Hi Darren, will you be doing the swim leg in a wetsuit? it is imperative that you train in one if you are. Use the pool for technique and distance, and practice slowly. You can conserve energy in the race and make up time on the bike or run. If you are swimming in a suit, you will have the advantage of being more buoyant and more slippery, but being higher in the water does take some getting used to, when you first use one. Good luck.