For those of you who say it's the CG that effects the climb, do a simple test. Add 10 g to the nose and throw. The plane climbs the same. The glide of course will be effected by the weight.
Now add some up elevator. The glide will smooth out, the throw will go over the top.
It's the elevator that controls the climb. If not, then our pre set would move the cg.
Agghhh. It's sort of like chicken and egg.
I'm surprised that Phil Barnes hasn't chimed in by now.
Sorry, it's a completely un-necessary post.