J-T, Sorry, I've been away. Some Warriors have their static port in the rear fuselage, between the wing and stabilator (look for the shiny round metal plate!) There is (in every Warrior I've flown) an alternative static source in the cockpit. This is activated by turning a small metal "tap" which is under the front edge of the instrument panel, just above your left knee. The whereabouts of the alternate static is usually placarded.
For Knobbygb, no problems that I'm aware of in slipping right.
P