Im relatively new (not too bad) to the game and I was wondering if anybody could help me figure out the new radial menu. I cannot switch between building structures, so I can only produce one set of above tier 1 defenses at a time no matter the amount of cranes or MCVs I have, and I suspect it is because I dont know how to switch between defensive menus in the new radial interface. If I click on my crane it only lets me build tib silos and support air pads, and if I pack up the MCV I dont have any defensive structure production capability at all. Can somebody please help me with this?

Crane's cannot build defensive structures, was patched in i believe 1.06 or 1.07 for TW and carried over for KW.