Speaking of AA units, did the Army have Rapier units or were they all Airforce? I ask this as Switzerland bought only 60 fire units?
All AA was Airforce, but they were used to cover the movement of the Mech Div in case of a counterattack. In addition there were fixed Bloodhound batteries.
Was the Dual 35mm AA an Army weapon or Airforce?
Airforce mainly to protect airfields I understand.
When did Switzerland procure Stingers? I kind of wonder why they did not have them earlier in the 80's?
The decision was taken in 88/89 and the first were introduced in 1992.
The Motorized Battalions in the Mech Div were organized the same as foot infantry but adding trucks?
yes. Unimog mostly.
Who manned the Sperrstellen found in the Grenzbrigades?
The Grenzbrigaden.
Did Tank Regiment HQ's the Recon Co, Grenadier Co, PzAbw Co and Lt Flak Co?
No. The tank Regiments had only a Stabskompanie (Command Coy) and a Dienstkompanie (Service Company). I think they 2 MBTs too. And some M113.
In the Stabskompanie, there was a recon platoon (jeep) and a bridge laying platoon (4x Brückenpanzer 68).
In the Dienstkompanie you would find the recovery vehicles, cranes, trucks and maintenance personnel.
correction those were with the Panzer Batallions