After a flight yesterday I noticed I was missing one air filter.
It apparently happened in flight but fortunately no marks on the prop or the tailplane.
Sometimes the F23 does a bit of a shake, rattle and roll on start-up until it clears its throat, which could casue the filter to 'walk' over time.
My old trike air filters had a tab on the filter that allowed you to safety wire it to the carb- good idea in a pusher!
I will be safetying my filters.
Thanks for the tip!