early series panel bodies [pre-55] used planks, later ones [55+] have plywood floors, and yes they all had the skid strips - but the year is needed to say anything specific
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
