Bold and beautiful colour scheme warbird_1. I love it!

As for the CG the Ultimate is quite tolerant. It should even be safe at the rearmost position on the plan. Just be aware that if you go further back than the CG range shown on the plan you’ll need to keep the speed up(relatively) on landing, or it WILL drop a wing(two
wings?).

I usually start with the CG in the middle range and move it back in small steps ‘til the plane holds a inverted 45 degrees upline without pilot input.
I them measure the CG for future references in case of repairs or modifications.