Same here, a recent diet feeder purchase arose as the salesman brought the company man with him who listened to what spec I wanted, measured a few sheds and told me what I needed. He wasn’t the cheapest but got the order as he made the effort.
i received same treatment a decade ago. Dealer brought company man out. Measured height of bunker troughs, told me all that was needed was couple of axle blocks fitted to raise height of tub.
Machine duly came a month or so later and was nowhere near to reaching troughs.
Had to then fit a side elevator to it