and the old slab (Hershey bar) wing. More drag at low approach speeds but less float.
Not correct, both the Warrior and Archer have the same semi tapered wing, the one that does cause float if the incorrect speed is flown across the threshold.
The 160 and 180 where known as the 160 and 180 and had the slab wing, the 161 and 181 are known as the Warrior and the Archer and have the semi tapered wing.
Sorry for the thread drift.
Back to the topic, I'd either send him a polite letter pointing out his poor etiquette and also stating, prior approval free, unannounced 50 notes, or the other option that appeals is to invite some friends to go with you to visit his office, making use of the waiting area to put your feet up, have a chat, a coffee and lunch (leave your lunch wrappers on the coffee table) and be sure to wave to him on the way out