A moveable tnt array - Minecraft 1.12 tutorial - a flying machine that can move 1 block, or dupe tnt

Nothing new here. Just something that I came up with.
I made this as a component in a bigger machine, but it's pretty fun on it's own, so here's how to build it.
It is a 3 wide tileable design, so you can keep repeating the pattern, and make it as long as you want.

You can use the mechanism at the end of this video to push it forwards:


My videos are fun at double speed :)
Some good music to play during my silent videos:

dupe,duplication,slimestone,compact,