I think you misread my post. You were correct, I wasn't trying to tell you 'no'.
It works in this specific configuration. Mathilde knows that because she tested a whole bunch of different materials with the help of relevant experts and assembled the ones that worked best, and all the ones that didn't work, or worked only in certain scenarios, were never on-screen. Might it work in a smaller configuration? Maybe. Maybe not. To find out, build a prototype and go out and test it. Are there limitations? Are there edge cases where it gives false positives? Test it in different scenarios. Can any arising problems be adapted to? And now you're at an AP's worth of effort, which is what I meant by it being difficult. It requires specialist skills and it requires a non-trivial time investment, it's not just taking the schematics and changing the scale from feet to inches. Maybe it will happen, maybe it won't, maybe I'll have an idea for an interesting way for those efforts to come up in the quest at some future point, maybe I won't.