Don't have to modify the nut that holds the cover on when it can't be grabbed any more......
I've had the old Tkat one on now for about ummm forgot
The ones I have now are courtesy of MadBill in Germany.
Filters are so cheap, I put on a new one every 2nd change,,maybe 3rd.
Just makes changing the filter easier as you get older (hard to get down there now)
Also I think that the filters may be a bit better now than the old air cleaner looking filter from 30 years ago.
Strength?
don't know never put it to the test but I guess it would not be hard to knock up a cover.