I used exactly the same instructions for my first batch of quail to process, it really is so easy, plus it gets rid of the parsons nose, which is not tasty in any breed of poultry.
Looked at the shape of the meat and decided to separate the legs out and spice and fry them in butter for breakfast whilst keeping the chests seperate as those really are totally different size and overcooking meat isn't good.
So, I cut them off at the natural line of the leg, then I made a cut to the breast bone to flatten the piece out, and hey presto, I had 'quail breast hearts' that fitted real well into the pan and cooked in unisono as the pieces were similar size.
Perfect Valentines dinner theme dish btw, those breast hearts just looks very cute, lovely way to present the meat, I was very happy to find it!
Guten Appetit!
Hoppelchen