Cool on the Gabby EAD... great key system and so low that now low reed is necessary.. 2 middle reeds are fine
Also if playing with guitarists or fiddlers.. good system
In my experience multi reeded boxes that get stuffed with mechanics and blocks can sound muffled.. this is the case with Hohner Corona IIIR and with some Castagnaris. I woned a compact 2 row Tommy that was a 2 row three reed.. Excellent engineering and craftsmanship but a lot of energy in and muffled.. my larger 2 row 3 reed Castagnari was not that way. This is not the case with their 4 reed 1 row. Loud,.
I,Too prefer, light fast boxes...over and above all the be.lls and whistles.. but I also like dry tuning 12 TET or 19 limit Just
Jazz tuning is also a tripp.. not for everyone but El Parche makes it flat smoke.
I happen to play a Panther in GCF. I've been screwing around with a microphone element placed in a tube installed internally to alter the sound mechanically. Try speaking into a drinking glass. There is the megaphone effect. Feedback is a problem. The resonant cavity must be phased properly to eliminate any modulation. It sounds kinda funky! This may work.