[IMG]http://i266.photobucket.com/albums/ii276/kingshootr/drum06.jpg[/IMG]
This is the inside view, with the grommet to the nameplate on the left, and the holes and screws holding the control side of the strainer holder.
[IMG]http://i266.photobucket.com/albums/ii276/kingshootr/drum07.jpg[/IMG]
This is the static side of the strainer holder.
I don't know if the holes from the holder you show in the link you sent matches up with the holes in the shell.
But... Is it possible when they replaced the strainer holder, they put the active side of the current one where the static old one was, and put the static new one where the operational old one was (swapped sides?)?
Again, thanks for taking the time to look into this.