Mapping time to faders?

Hi all,

Is it possible to record time properties to a single fader? I do a lot of busking and if I could set the global fade times for when I select my palettes from a fader instead of a Time palette or simply typing it in, life would be much easier.

What I have tried to do is create two Time palettes, one set to 0 and the other set to 15. Then I attempted to create cues holding only timing and cross fade between the two, but the timing doesn't seem to hold or take effect.

Is what I'm trying to do no supported or am I going about this in the wrong way?