I had heard about it, but had never tried. I thought it didn't work anymore. So I did it on two of my bases and it really still works - the video is recent from September this year, but I think you have to get rid of all the ships and troops on your SC first and have no training queue on hero/starship command or it won't work.
You have to be fast or you will lose a lot of heroes (use samples of course) until you get it right lol
The game sometimes freezes and you have to restart, and if you attack a rival then different kinds of bugs can happen from screen messages that hero/starship was destroyed, replay glitches, and others.
Studying layouts on how to earn heroic defense without having to use hero, sc, and ships is one of the things I enjoy doing in this game. But if you have a mini with two level 1 turrets, and can't win the Bronzium Crate, your problems are over.
It reminded me of the CNFO bug on Windows to freeze dekas and disable traps and pissing off your rival at the thought that you were cheating when the replay showed a defeat when you had a real win. Not so real, but a victory.
And it's not a cheat, it's just an exploit of a programming flaw, bad for the Devs.
SWC Windows survivor.
Imperial HQ 11 & Rebel HQ 11 on vacation.