[Zimbo16]

I'd expect the faster 583s to be doing mid 1.50s, but there'll be quite a range of speed and experience so I shouldn't worry about it too much!

<edit: just checked, last year's fastest 583 (of just a handful of 583s on the grid) was Skidlids, 1.54.>

[Edited on 16-2-2006 by Zimbo16]