Staple (tube) research

I am planning a project which will involve me in studying oboe staples (tubes).  I would very much like input from as many oboists as possible. As a starter here are three questions about which you might like to drop me a line:

1. How much thought have you given to your choice of staple?

2. Do you always use the same make or do you use what comes to hand?

3. Do you think there are problems with the design of the oboe staple and, obviously, what are they?