Epoxy inside the cello changes the sound

When I had all the bones and feathers glued on the front of the cello, it would get a buzzing sound, and I couldn’t figure out where it was coming from so I took the accessories off and took off the back of the cello as well, and I saw the inside wasn’t glued very well, and the Kerfing didn’t even go all the way around, so I poured epoxy all over the inside to seal the cracks, and it helped it tremendously. Then I got a wooden bridge to replace my 3-D printed one and carved it to fit the belly exactly And I made a new sound post with a stick of Ipe. When I glued the back back on, it changed the angle of the neck so then I popped off the fingerboard and cut a wedge to make it point to the bridge in the right place. It’s about twice as heavy as it used to be, but also twice as loud.