Hey community, a bit late, but ... KUDOS TO YOU! Thanks to you, we got accepted in the semifinalist list of hackadayprize!

To celebrate, let's share what we did with a probe found at 70$ on EBAY, which was supposed to be broken... well, that's what the vendor said! After opening, rewiring some cables, we found out we could get echoes:
Well, with the modules underway, and the existing Murgen board, we can now stopping worrying about the continuous rotation of the head and the noise it gives.

Sweet! And a great time opening and repairing: