Fist of all excuse me if my english is difficult to understand.
I find it very important that you try to get your % to Betfair as low as possible. Its a huge differens between paying 2,5% instead of 4,5 % in this kind of work.
How are you pro arbers handling this? Do you take the arb you get with betfair and thats it or are you more active trying to push the % down?
Meself seems to be stuck at current level and thats not good.
Make bookmakers cash cow machines