Thanks gunny, I think some use of prizemoney or API is probably the best way to go about it, just looking for the thoughts of others. I thought a few more people may have jumped in with their ideas or maybe they are keeping their cards close to their chest.

The more I think about it the more I'm leaning towards something that revolves around prizemoney won in the last 12 or 18 months and adjusting it for possibly lengths of victory (or loss), starting odds, size of field etc etc.

Will see what I come up with unless I can some additional input.

Cheers