Looking very, very good!
One thing I would reconsider is the stab balancing. I am not sure that is even needed, as every jet I ever saw with the radio turned off, the stabs were hanging down, and they fly just fine without being balanced. As a matter of fact, they actually "weather vane" when the plane is in flight, so the load on the servos is decreased. The debate on the pros and cons of stab balancing is always going on in the Jets forum. But, each to his own. I would balance them slightly rear heavy myself.

Spar

BTW, this is the best bottom shot of the jet. Not the best, but, you should be able to use it for the scheme.