I am new to this wonderful hobby of RC planes, and am wondering why I never see air cleaners on engines. I have looked on Tower Hobbies but all I see are filters for smaller scale engines, probably for cars and trucks. Any engine would last longer if it wasn,t ingesting fine dust particles. I have always heard its the fine dirt you can,t see that ruins internal combustion engines. Anyone have experience with filters, do they cause more trouble than they are worth.