An old question is how to change the stingers used for playing events on the fly

This works

As Example have 2 stinger inputs (example Stinger 3- Slatz Red- No Logo.gtzip and Stinger 1- Liney Blue- No Logo.gtzip)
Create 2 shortcut SetDynamicInput1 with value 1st stinger input and SetDynamicInput1 with value 2nd stinger for selecting a stinger (Perfom at least one before continuing)
Add a Transparent input and give it a few triggers
- OnOverlayIn : function= OverlayInput1 , Input- Dynamic1
- OnOverlayIn : function= OverlayInput1 , Input- Dynamic1, Delay= 1000
In Overlay settings Specify Stinger 1 to be your transparent input (effect dur,duration,cutpoint set at 1000, might have to play with the timing depending on the stingers used)
Specify in Instant replay your In (and/or Out) Transition as Stinger 1

Change the wanted stinger to be used with your shortcuts for playing events

Play your events