Removal of Optimus/Lineaum dipole tweeters

I think you mean capacitors, not resistors, Elevick.

I modded a few of these for use in a HT system. I replaced the stock cap on the tweeter with the same value Auricap, and the inductor on the woofer with a better one. A little Mortite on the woofer basket helps to reduce resonance/ringing as well. They sound pretty good for what they are.

Yup, the whole thing comes off in one piece.

Press Mortite (rope caulk, available at Home Depot) into all the nooks and crannies of the faceplate to dampen it - works great and doesn't dry out.

Glue a piece of felt (cut to size) to the top of the cabinet, under the tweeters. It will help to tame diffraction effects.