Hi Ginge and Jac,
many thanks I think I’ve pretty much got the gist of it now, although at the risk of looking a complete idiot I have to admit I still can’t see why you would only tip in fifteen races rather than twenty five?? 
And one more quick question reagrding the Oddschecker Jac. When you say I can find the odds for any of the races at Ascot you mean those in the competition right? I’m still not able to get odds for Mars in the Tercentary am I? (I want to back him.)