I have to agree with our friend Hassels Here as I’m not gonna lie that must’ve taken a steady hand and a lot of patience but boy do you have both of this great attributes and in spades
For what it’s worth, what I like to do when I’m trying to accomplish a similar goal (meaning add more depth and core to an extremely bright sounding piece), Is I like to begin by thinning the inside of the rails, assuming they’re thick like yours were and then I will often extend the window a bit further down into the table. I’m not talking Going extreme like on say Jody Jazz’s DV, but about maybe a quarter inch all the way around the curvature of the window usually adds enough of that thickness that is often lost on high baffle small chambered pieces. Essentially It doesn’t really matter whether you do it my way or your way as the end result more or less is going to end up being the same which essentially is just increasing the size of the chamber. If we’re splitting hairs I might say that adding that bullet chamber like you did might actually have a smidgen more ofOverall total impact than just enlarging the window and thinning the rails from the inside simply because that bullet chamber took more material out of what I like to consider or call the primary chamber which in my opinion is going to influence the sound more so then it would buy making changes further downstream on a mouthpiece. I know I’m rambling so I really hope that makes sense
