Lyre Holder

Since I am in marching band, I need a way to hold my music for when we play in the stands. But the lyre (music holder) I bought was for the base trombone instead of the tenor trombone (the standard one) so it didn't fit unless I put a rubber band under the ring which stretched it a lot until it snapped. So I printed a piece that holds the bar while attaching to a place on the handle that I do. The holder fits very snuggly and snaps on, the problem with this is that is also breaks very easily, I have destroyed at least five over around two months and have needed to reprint so many times that I always keep two extra in my bag. I have also had to remodel it several times because I had incorrect measurements and was using Maya, a 3d animation software.