I have an old Conn 16M that I had into the local shop. They replaced a bunch of old rotten pads including the octave pad on the neck. Since then, I have been having issues going over the break and also a bit as the secondary octave key kicks in and this one closes. When I watched it as I was playing, it seems like it is kind of slow seating back down and as well, the pad doesn't seem to seat down over the hole as snugly as the old one. Last night I tried putting an elastic right near the pivot to give it a bit more spring back down and it seemed to help. I think I need to replace the flat spring that presses the octave key down with something a bit stronger. I guess I could take it back to the shop, but being fiercely independent, would like to find somewhere to get springs to replace this on my own. Any thoughts?