@skeeterdav, I did the same thing a several years ago (twice) and whether it was Barenek’s law or not I quite liked the result.
The first mod was on a pair of CW2s wherein I only switched out the mid horns. There is better alignment of the drivers with the shorter K-61 horn so that is a factor. The actual mid driver is the same on the two horns, same motor. Only the coverage of the lenses is different, slightly less forward, or more neutral, may be the best way to describe it. Tractrix vs. exponential.
At the time I had been searching unsuccessfully for two years to find a pair of Chorus 2s to try, but north of the border things are scarce so I took a knife to my Cornwall 2s. I regretted doing it later, but the newest Cornwall 4 looks more similar than different.
I sold them about a year later to finance my first purchase of actual Chorus 2s.
A few years later I did it again when I got a good deal on some final run beater CWs with the B-3 crossover. At that point I had acquired Crites cast frame woofers and Kappa 15Cs and since I had K-48s from the Chorus 2s I experimented with all of them.
I preferred any woofer over the (venerable) K-33, …still do.
Even though the Kappa 15C has a very low Xmax compared to the others it worked extremely well in the Cornwall box. I had to dial my 110w/ch Onkyo to 11 with the bass cranked up to get the woofers to even move. Very tight, articulate and clean. I don’t think the K-33s play any lower than the Kappa 15Cs, they just sound that way because the upper bass rolls off sooner.
The Crites cast frame gets the nod though, they instantly realized an audible improved low end response not possible with the K-33s. Later I tried Dave Ault’s LMAHLs in them for the cherry on top. In the picture below the tweeters are the K-107-Ti, but I didn’t care for them in that application. Maybe if I had attenuated them a couple dB.
I still have the second pair. Down the road they WILL get the ZXPC 18x10 / PRV D2200Ph combo, but that’s another story, it will require cutting a new motorboard.
I played around with Chorus 2, Cornwall 2, and even Forte 2 (because I had them) crossovers, but always came back to the B-3s. Not sure exactly why, but the B-3 sounded right to me even though I wanted to like the Chorus 2 boards.
Here’s the thing though, as others have mentioned, it’s a tight market for modified products. I had no trouble selling my pair once the buyer heard them, but others may not be open enough to even listen. Those are a good price for what, subjectively, I would say is a better sounding speaker than a stock Cornwall 2.
Where are you located “rustneversleeps” ?