This is the first time that the ACF PD3500 has appeared as a high-quality plastic model and Rapido intends to do this classic and much requested design justice! The body of the Flexi Flo evolved rapidly during its two years of manufacture and the Rapido version replicates all these changes, including different strengthening rib and weld line arrangements. We are also debuting a brand new 125-Ton Barber S-2 truck used under many of the NYC cars.