Mods for Avantgarde speakers

My Duos (vintage 2002 or so) have - in addition to the Omega update, which is extraordinary and a no-brainer - the Cardas jumpers and Grand Prix Audio Apex footers.

The only speakers that would ever take their place are Trios w/Basshorns.

Jim, what is the recommended distance to move the tweeter back - 20cm? Seems like it could be easily accomplished by drilling 3 new mounting holes in the tweeter tube housing, then filling the old ones with rubber grommets.

I understand this might cause an issue with reflections off the rear of the mid horn, but if there's a clear net gain in coherence...also, my horns are all in the highest mounting holes, so perhaps tweeter housing could be vertically dropped one position to increase vertical distance to mid horn housing, thereby minimizing such reflections.

PS - thanks for all of your continuing helpful tips to the faithful!

To clarify, the CPC charged cap is part of the new crossover included with the Omega driver upgrade; does not have to be added if you've already done the Omega upgrade, or bought Omega version to begin.