@CluelessTTDad
Now I don't mean to confuse you and I'm aware that you already ordered the new set up for your son. I understand that the Vega Pro is going to be put on the bh too, right? Well, I played the Vega Pro for quite some time (both on a composite (Viscaria) and my KJH, a 7ply allwood blade in the off minus range). It is actually one of my favourite rubbers.
I'd like to point out that the Vega Pro is a pretty hard rubber (medium hard to hard sponge (47.5° on the ESN scale) and also a rather hard and somewhat "dull" topsheet) which has
very low catapult (compared to stuff like Tenergy, Evolution, Mantra etc.).
My point is: It is an excellent choice for the fh, but probably not so much for the bh, since it is not that easy to get decent or enough pace out of it (it is good for blocking close to the table though...). Most youngsters prefer to play with the fh and generally spoken, you can swing faster on the fh side, so playing the Vega Pro on the fh is not so much an "issue"). I know that Carl and others recommend developing players to play the same rubber both on fh and bh until they have developed their own style and are ready for a different set up, i. e. different rubbers for fh and bh, if necessary. I support that point of view and I also agree with Carl's recommendation to get your kid to use his own power instead of relying on the speed of a given set up...
But as I mentioned, it is oftentimes hard (probably even more for an 11yo than for me) to get some decent pace out of the Vega Pro on the bh side. When I had it on my Viscaria, the VP got the additional kick from the ALC, but on my KJH it was definitley too slow. Since your kid gets coaching he'll learn to properly bh topspin and in match situations he'll find himself in situations where he has to lob or (passively) block from two, three or whatever metres away from the table. I do not think that the VP is particularly good for that (bh topspinning, getting out of defensive/passive situations). It is not excactly bad, but let's say that other rubbers do a better job at it.
So, don't be too surprised if your son mentions one day that the Vega Pro is too hard/too slow for his bh. If so, you can still slap him a Vega Europe or a Mantra S or M on the bh side (Mantra M is really good!)... or you can boost the shyt out of the Vega Pro
Anyway, good luck to you and your kid. Keep us updated. I like your thread.