It's all up to you in the end. You've got lots of wing area and a nice light projected weight so there's no real need to do new ribs if you don't want to. Or else your next model can use the first rib set.

A hint that's worked well for me doing joined wings. I make the wings all in one peice with the tube in place and solid for now. The two ribs where the joint will be are spaced apart slightly. Doing it this way ensures the tube lines up 100%. Following the glue setting up I run a saw through the joint line to cut the tubes and other wood parts that pass over the joint line. The ends are then dressed up and ply face ribs added to help prevent dings along the joint. By doing it this way if there is any slight misalignment it's not important since the misalignments are complimentarty on each side and the result is a straight wing.

It sounds like you've planned this out well and with some background. Best of luck with the project.