Yeah, that confused me as well. Not to mention those screws arrive already inserted into the panel piece, so all they have to do is place it in the door and turn the screw, about 10 seconds of work. Yet he wants a person to have to fiddle with making sure something has clipped in for no other reason than it's something he came up with. If no one has used that since 1985, maybe he's the one who has it wrong.It is interesting, but I don't get his fascination with clips. I can not even begin to count how many clips I have bent or broken over the years. They will work fine if you never have to remove it, but in my experience you run into more trouble down the road using them. I really like the quarter turn screws.
My company has shifted their design philosophy from DFM to DFS, where possible, but there's always a balancing act in trying to keep costs down on the manufacturing side, both labor and materials. Previous designs, the service team was never involved during the R&D process but in recent years, a few designs have been modified to allow for easier serviceability.DFM (design for manufacturing) guys love clips and other single-use fasteners because they are intended to be used once and don’t need tools for installation (which makes for quicker installation). DFS (design for service) guys hate clips because they are hard to take apart without being compromised and usually require super-special tools to disassemble.
Being a guy who has worked with the line as well as having torn apart more than my fair share of stuff, I side with the DFS guys. Give me some screws and Dsus fasteners.