I love that handling except for the idea of switching the colours of the piles. I perform that by using the move from Galaxy.
Can't say I am familiar with that move. Do you have a source for it? As I am intrigued.
I would say though, that whilst the switching of the colours is totally illogical, I have never had it questioned. I usually fob it of with some dumb excuse about trying to prevent the spectator showing preference to the left\right pile (seems to work)! Plus, when you pick up the piles to show them, if you do it right, you can arrange them so that the final image is that of one red pile and one black. This final image is so powerful it is the one that sticks in their mind, more so than the two rows of two colours.
Plus in my experience, when people remember the trick, the never remember the fact that you dealt the first half of the pack, or that you switched the colours half way through. They remember it as they shuffled the deck, dealt it into two piles and all the coulours were separate. Real magic is what people remember, not what actually happened (as some previous posts have pointed out)
Rev