I've been doing a bunch of reading today on what you need to do to balance a canard plane. It is not easy, especially when you add in a biplane design - something that doesn't really exist in the modern world. The only one I can think of off the top of my head is the Wright Flyer, which didn't exactly fly well.
You have to take into account how much lift will be generated by each wing, and on a wing like this, well, good luck. The wing design I'm using is partly on purpose, and partly expedience. I'm hoping the under camber wing tips will help with low speed, in addition to the step that's the width of the ailerons. It's closest in approximation to a KFM-8, which is experimental without a lot of supporting data. That's all before you deal with the sweep, bent wingtips, polyhedral, dihedral, anhedral, wing interference, and canard interference.
So, after a bunch of fuzzy math, I've decided to guess. CG is gonna be set just in front of the top wing as a starting point. I'm sure it will probably get moved, probably back. The good news is that it can moved with little trouble, battery position should have a long range.
Got the landing gear, horizontal stabilizers, and servo linkage figured out.
I think I'm not going to mess with the cockpit until after the maiden flight. There's too many things to change if I have to move the wings around.
If the weather is good tomorrow and I'm not too busy, we'll get to see if this thing will fly or not. I may borrow the neighbors airstrip so I have asphalt to take off of.