Here is SRJ3 convergence to 2000s with your numerics:
Here is SRJ3 forces results to 2000s with your nemerics:
Here is SRJ4 convergence to 2000s with your numerics:
Here is SRJ4 forces results to 2000s with your nemerics:
All the results shown vary less than 0.1% between 500s and 2000s.
What are we trying to determine with these plots?
Dale