Well done there Robbo, much better than I did in my one attempt at racing (well not really racing just surviving as long as I could might be a better term).
I was speaking to Metro about ratio's he has some other front chain rings that he can fit that would give him a more appropriate gang gearing, 48 x 16 is a tad too small for a flat course like that when you have a big powerful commuter like him pushing it.