Since we're on the topic of DIY stuff for your camera gear... Here's what I recently did to my speedlight. Desperate times call for desperate measures!
In Nepal very hard to find diffuser domes hor. Even if can find will be damn ex ok. Actually I also did this during YOG. I used my huge press accreditation card which was white and reflective on the back as a flash bouncer LOL.
And.... Tada!