The Cadenza came out years before the R104, which in effect was an update on the two-way-with ABR concept. The 104ab refined the crossover out of all recognition and I understand the Corelli was a smaller two way with the same drivers and crossovers as the 104ab, although I never took any apart to compare them.
Perhaps you could try 104ab crossovers in the Cadenza's?
By the way, at one time Wilmslow Audio used to make and/or market revised and updated crossovers for the Concerto/KEFKIT3. These were easy to replace at one time 'cos the crossovers were mounted on the front baffles behind the grilles.
Tear down these walls; Cut the ties that held me
Crying out at the top of my voice; Tell me now if you can hear me