Spin recovery checks during my UAS days on Bulldogs. It's been over 15 years since I last flew in a 'Dog, and I'm convinced they could well be my final words on my death bed so forcefully were they beaten in to me by my instructor at the time.
For a left hand spin - seemed to be usual / more common than right hand spin - engine torque issues IIRC:
Check height
Throttle closed
Needle left
Full right rudder
Control column centrally fully forward
Spin stops
UP recovery
Check Ts & Ps and deadwing clear.