What about the idle check, wouldn't that be better carried out with Carb Heat Hot as would be the case in a descent or in fact whenever the throttle is full out? This will indicate whether the engine continues to turn at the lower RPM experienced with Carb Heat. Approach speed Airflow will assist here of course but if it will idle on the ground with Carb Heat Hot then thats a good check.
Most checklists don't call for this.
What do you think?