There’s a lot more to teaching someone to fly than you being comfortable in the right seat.. you need to know when to allow someone to have the controls, and to be able to allow them to fly but know where the limits are, so you can gently keep them safe. Recently an experienced (non CFI) pilot took up a student and allowed them to crash the plane. Actually I have several stories like that that I personally know of. Not that being a CFI means they are good, but just keep learning and be careful with allowing someone to operate the controls on takeoff and landings.. Students do weird and unexpected things!!
Good point about keeping the shoulder harness loose.. the important switches and things are often hard to reach from the right seat. I keep the shoulder harness loose and usually slip my arm out to be able to lean across to manipulate things.
Sweet takeoff by the way.. nice job getting that nosewheel just off the ground early.
On most planes, the copilot brake lines being nylon, feed into the pilot side before they head to the wheels. That gives extra points of failure, and losing a brake on one side in a -A model could be really bad on a short, paved runway. Give them a good look and consider TS flightline Teflon braided lines throughout the system. I’ve also seen air bubbles migrate in the crossover lines, reducing the copilot brakes effectiveness… just another thing to check for and reason to upgrade away from the nylon ones.