Dude65. Don't know about the Tomahawk but for go-arounds in the Cessna 150/172, their Pilot's Information Manuals state that the throttle should be opened to full open first then carb heat pushed in to off. Few people realise this especially on touch and go landings. Ensures hot air melts any ice that could prevent full power being available.
Regarding practice stall recoveries in Tomahawks. If there is a placard on the instrument panel, is it a CASA approved placard or the owners personal placard, or the CFI personal placard? I doubt if the placard is a manufacturer's requirement.