There is some truth to that but, IMHO, the design is sent to the manufacturer, regardless of who makes them, from Hooker. Hooker is responsible for checking the product specifications before it goes into mass production. I’ll bet they were trying to take 3-4 different designs and make a “ one fits all design” to cut down on costs. And a small print line in the instructions that says “ slight modifications may need to be made to fit your particular application “. Like I said, just my opinion.