Been tinkering with my microcontroller-based trigger/timer for so long, thought it was time I actually used it for some real shots!
It did make life easier than my previous attempts with an analog timer - accuracy, repeatability, plus the fact that I could use it to trigger the camera (when beam first tripped) AND flash (240 milliseconds later) made it easier.
This is a sequence of three different drops, from slightly different heights (if it's dropped from higher, it's going faster when it cuts the beam, so it reaches the surface slightly earlier relative to the flash time).