I cut the note to try and get the best bits and then stick them to the tube. They butt up against each other not overlap as that would show. Its a bit fiddly and quite expensive if you get it wrong with a £1 costing a few quid but worth the effort. I too remember when a penny chew cost a penny
I will be casting a 10 bob note and fiver today and hopefully they'll come out just as good.