Best advice is to listen
I wouldn't dismiss CharlieChan so quickly my friend. His reponse is actually quite funny if you are a real trader. £40 is nothing. If you're having second thoughts about chucking that amount of money at a real product (albeit one you won't see until you get it) then...
Execution
Marek,
I think there is a partial answer to your question in the following article in the Knowledge lab
http://www.trade2win.com/knowledge/articles/general_articles/those-darn-market-makers/
GB