@Andrew That solution does not work if a second item to be delayed arrives before the first one gets sent out. For example, try clicking on "I am a list" and then immediately click on "I am not a list".
I just made an abstraction out of [pipe] bracked with [tosymbol] and [fromsymbol]
Not sure it's a great solution as a lot of symbols will get created representing note numbers with different velocities but it seems to be fast enough for a quick hack that I need.
Well, for the particular thing that I need to do, I can arrange to have constant velocities so there would only be a few dozen symbols created.
But I guess there really needs to be a verison of [pipe] that can queue list entries properly, which is sort of what that coll example is doing.