The Cornerstone 45A is the kind of rig where owners start using phrases like 'comparable to multi-million dollar coaches', and they're not wrong. A 600-hp Cummins diesel pushing through a Spartan chassis with Bilstein shocks and a passive-steer tag axle gives it handling that genuinely surprises drivers used to big Class A's. Inside, the Aqua-Hot 450 hydronic system handles both domestic hot water and in-floor heat throughout the coach, backed by three 15,000-BTU heat pump A/Cs and dual 3,000-watt pure sine wave inverters for serious off-grid capability. The exterior 2.8 cu. ft. Dometic fridge on a slide-out tray, 50-amp cord on an electric reel, and Sani-Con macerator system are the kind of details that matter on extended trips, and this floor plan is clearly built for them.
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Class a motorhomes that share features with the Cornerstone 45A, like diesel pusher.
