OK, it would be good to use VegasSpeak:
Files in the Project Media are referenced as MEDIA
Media when place on the Timeline are called EVENTS.
Now, if Media 1 thru Media 3 need to have FX1 then you can add this FX at the MEDIA Level, and wherever Events beloning to Media 1 thru Media 3 will have FX1.
* Grazie
Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge