Think, Terril. I know you can remember. There are no twinning drills on OT3, nor OT1 or 2. There is just no twinning. Checkouts are sup only, remember? Maybe I remember it better from working at AOLA. My super set me aside in a room by myself when I read the materials.
I was on the RPF when I finished OT3. If any part of it could possibly be twinned, they would have made sure it was twinned, believe me. The RPF really disliked me leaving their 'palatial estates'
in the tunnels to go aboveground and across the street to AOLA. They even walked me over - but that's as close to twinning as it ever got. Dude's been trolling under different names for days. He just makes it up as he goes.