I have been messing around with medium bores and picked up a 25.1 top with a 65 throat (6.5mm). It’s a V+ cup, so it’s a little deeper than the standard C cup. I didn’t notice a huge difference, but it is noticeable.

I couldn’t find a back bore I like to pair with my horn, so I’m trying to unload the top.

$100 shipped CONUS