So you'll do the optional step of regluing the dust screen onto the mounting ring?
If you are planning to do everything else without even at least cutting out the dust screen temporarily, it's gonna be nearly impossible to pull off a neat mod job. The dust screen is right in the middle of everything, and you'll need it out of the way to work on e.g. creating all the holes.
Hey jerg, something that would make me feel a lot more secure about trying this mod is if you could put the dust screen on one of your pairs and report as to whether it sounds the same as without it. I may try this but the dust screen is a must.