I now the basic principle behind this effect but have decided against purchasing it just because its not practical for me right now, but i did come up with a way of presenting it using UK notes that is logical:
Use cheques, then you can use a number of ideas. A new way of carrying around money. I just carry blank cheques around with but as soon i sign one of them, look, they all turn into £10 notes. Or can i borrow a tenner sir? Hold on i'll give you a personal cheque just in case something goes wrong and i uh destroy your note. Oh thats right I'm a magician, watch, there we go, five ten pound notes, but i'll put them away and use your one, its just more fun that way!!
Lots of ideas for a good presentation. I didn't have any notes to check against the size of my cheques, because i am poor, hence why i decided not to buy this trick, i can't afford the other expense of having 40 or 50 quid invested in one trick, i'd end up spending them and just being left with the gimmick!