@@kristinmaute1237 That looks like a fairly large bore horn; I admire your handling high notes on it well.... I have a Bach 42, large bore, and I usually let my son play it. I stick with the medium bores. None of my horns have F attachments, and I wouldn't know how to use it if they did. LOL... But those large bore horns produce beautiful tones. You're way out of my league, but I enjoy listening to people like you and Urbie Greene to try to improve tone.
Kristin Mante, my 2 Bach Strads are light weights too with thin skin, easy do dent but wonderfully light and produce a nice "bright" tone. Mine have .509 bore on both tubes which make them easy to clean with my 20 ga shotgun patch... One of my Kings has a sterling silver bell with a silver plated slide. Not a big bell bug a very "bright" sound.