Good thinking went into the effect and Michael Murray is a beast when it comes to that!
The core method is what I’ve expected it to be.
There is a obvious limitation with this.
I’ve asked myself if a simple thought of your participant could put the illusion at danger. Even
with the nuances explained.
You ask your spectator to name a number and remember the card at
that exact position.
After byplay, a simple but crucial move and convincers you later reveal
the card at that exact position.
The nuances to sell the effect are reasoned but also
necessary.
The whole thing is very procedural and you have to like and sell that.
Fragment seems very well suited for impromtu situations and a borrowed deck on the fly.
It will not replace the versions I already use.
There are much stronger and direct CAAN and
ACAAN around.
The procedural handling of Fragment makes it less transparent (in terms of layers
of deception) but potentially less entertaining in my opinion.
If you like it - go for it!
If you still have a good and working version there is no need to get this.