Royal Icing Transfers

I have an order coming up for a birthday party with a Robin (of Batman and Robin of course) Lego theme.  We decided to go with legos cookies and I was told there was apparently an "R" logo for Robin.  So I googled it and realized that there was no way I was going to be able to do that cookie freehand.  I just do not have the piping skills to pipe it directly onto a cookie.  Then I saw The Vanilla Bean Baker had made Batman cookies using what is called a royal icing transfer, and I realized that I could totally do that for the Robin logo.  So I've made up a few, and I think they turned out pretty well. 

Now comes the tricky part though, the part where I have to remove it in one piece, center it on the cookie, and get it to adhere to the icing without breaking it.  I'm a little afraid, but I only committed to the legos cookies, so these will just be a bonus for her if they turn out.  Wish me luck!