Looked up ammonia fueled engines on the internet, Large slow turning marine engines lend themselves to the use of that fuel. Seems like the combustion time required to get to zero emissions plays into the concept. A study in Sweden concluded that smaller faster turning motors have too many issues with complete combustion to allow zero emissions. I do not know what your issues with Hyster /Yale are but you seem to have them in droves. Hyster / yale like a lot of brands have a large product line. Taylor has their niche market like other builders of ready ship of proven concept equipment. Where are your ready to ship proven products?