Mark,
As requested, here is my feedback.
You have two tricks which you join, or are considering joining, together. To me, they don't go together.
The first is a lovely production of 4 cards, I can appreciate the skill involved in that and thought it was great. However, it would be of no use to me in a pub or table hopping situation because I suspect you have very little angle to play with.
The second trick is based on numerous older effects swapping one set of cards for another, again, I'm not going to fault you on its performance.
Now, down to the critisism
I accept that you haven't practiced the patter and that is why you miss-called a couple of times and also why you stuttered a bit on what to say, however, I'd have run through my patter a few times before I ran the video recorder just to make sure it looked better than it did.
My main critisism is down to the miss-match of the two tricks. They don't go together. The production of the first 4 cards was excellent but the follow-on should have used the same 4 cards only.
Look at what you did. AND look at it from the eyes of a spectator. You made 4 kings mysteriously appear, then each of the kings turned face down one at a time. Excellent, but why the hell did you pick up the deck. You had no need to pick up the deck to change the kings to the aces !!
Now, yes, I know that you did, for obvious reasons. But to the spectator, there was no reason for it. That is why I think that the two tricks don't go together.
To me, the second trick would have worked so much better if you had taken the kings out of the deck, placed them on the top as you did so, copped the whole bunch and then discarded the deck and completed the trick.
That's a natural process of events. But to produce 4 cards from thin air, and change them to different ones, why pick up the deck and put it back down again, its not a natural process.
Hope this helps. In no way am I criticising your handling of both effects. They would stun Joe Public every time. But they don't naturally fit together as a routine.
Tenko.
Yorkshire, UK
Male, 55yrs old, Retired.
"I don't believe it" Luke Skywalker
"That is why you fail" Yoda