Hey Tlaloc! I was inspired by your method to buy a programmable vibrating timer for myself, and I used it last night with excellent results!

Here's the part of the dream relevant to the device:
Spoiler for EILD-triggered False Awakening:


Full DJ account here: October 5, 2014, "If there's water near the house, it's a dream."

I hope it continues to work this well or else I'll have to figure out ways to counter habituation, but it definitely works in principle!