Ballpark, how many times can you put a screw into a platenut and take it out again, before the interity of the platenut is compromized? Is it on the order of a few times, or a few hundred times?
I've been removing my cowling at every oil change for 14 years. There are 24 plate nuts. I've had to replace 2 because of galling. None have become loose.
I used platenuts, #6 CS torx screws and tinnerman washers for the top curved part of the cowl attach and it works great. It takes about 1 minute to remove the screws and a couple minutes to put them in using an electric drill.