I bought this tree blindly because of the apple varieties and didn't realize exactly what it was. Now that they are establishing I'd like to take hold before they are too large to manage. I'll post a pic. I believe it's the trees 3rd year in the ground.

Should I be cutting back the larger branches coming off the scaffolds and then the smaller bud branches cut back to 2-3 buds??

Should I have this on a wire trellis to tie down? 

Also have some funky stuff going on with the branch and not sure.if.i should cut that scaffold or let it go.. Ill post pics. Again thank you guys for you advice!