The 45 MXT motorized chassis provides a sturdy foundation for the classic enlarger system. The chassis has a triangular, reinforced twin girder frame which permits the enlarger to produce prints greater than 16"x20" on the baseboard using 35mm film.The chassis has many features including a micro-adjustable motorized elevation control, easily aligned lens stage, rugged and rigid triangular truss, turret compatibility, right-and-left pinion focusing knobs, spring-loaded snap-in lens boards, precise reference scale for reprints, neoprene light seal in the upper negative stage and turret.Works with all Beseler 45 enlargers, light sources, negative carriers and lens boards. Handles all formats through 4"x5".