I did read what you wrote.. The "vault/chest/box" was "allegedly" 7 foot high!.. There is NO WAY you can push a 7 foot high square concrete box into solid ground or clay without displacing what ever it is being pushed into. This is not cake... Cake is not solid it can be compressed.. Solid ground/clay/mud cannot be compressed.. You try it.... It must have somewhere to go in order to move out of the way of something large being pushed into it...
The land they are digging in is tightly compressed glacial till.. This is very dense earth..
https://www.oakislandcompendium.ca/blockhouse-blog/10x-and-glacial-till-and-dan-henskee
Further highlighted by the problems they were having when diffing 10x
They did not speculate that they had broken a section of the box off as they did not find any evidence in the tailings... I agreed with you in the sense that the drill would of smashed the box to pieces if it came into contact with it.... However the Laginas speculated they had pushed a 7 foot squarish concrete box of into the solid earth...This is what I have said is not possible...