It's a well-recognized path. But, originality is still there. +1
I have came up with the idea on my own and have not copied anyone.
even if you made it from scratch,it still can be copied.Badly copied.
Not copied, huh? That's questionable. It's a slightly revised version of a tester made a few months ago. You need to make the outer frame at least 3 blocks think or the pressure leaks out. Also, If the point of the pressure tester is to break the materials, you shouldn't use materials that don't break, like titanium.