Ultimate Hidden Entrance

Nether underlava flush with the floor redstone activated BUD triple piston extender hidden entrance!!! Perfect for hidden bases, bunkers or hiding stuff!
I think I have perfected my most complex build. Working as of 26.2

I have uploaded a .nbt file. You can put this inside your world save, under /generated/minecraft/structures. Then using a structure block in game you can load the entrance. Then just replace the top and the floor inside with your block of choice.

Previous underwater/underlava hidden entrance video:
https://www.youtube.com/watch?v=d9kObPejDTo&ab_channel=Reaven
https://www.planetminecraft.com/project/hide-your-stash-underlava-in-nether-minecraft-1-17/

Intro song:
TOKYO MACHINE & Guy Arthur - GET UP [​NCS Release]
www.youtube.com/watch?v=HV7mLcsUp5U
Outro song:
Vacation - Markvard
www.youtube.com/watch?v=nxYoIurjLX8