I must admit that it has always been a strange thing that the Strad has to be emptied this way. Imagine a Marching Band scenario, and fidling with taking the bottom section off the 3rd slide. How many times have you guys dropped or had the section slip when doing this?
I have lost count. I do like the Strads, but find this manouvre a complete mystery.
I have a set of Saturn valves on one of my Bach Strads (37 L Bore), and they work a treat.
You'd think that this design would have been fixed a long time ago....