That is a pretty small branch, but the Thompsons listed apple as a candidate for ELB design.
Whatever you do, I would make them close to the same, i.e. not with one side round and one flat in cross section...
I would make stiff tips (narrow and deep) and a mid-limb cross section a crowned rectangle or something like that...
I've been eying some apple suckers that shot up really long after a severe pruning, so let me know how it comes out.