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MScorpa, it is a lock wall, going from the chamber through the concrete to a 6'×6' well in the wall... so there will be a little room to play. We have a huge hydraulic unit, but will have to buy or rent the drill. Do you know the model of the drill you posted?
Does it have to be a core, or can it just be a hole? The Stanley DL-07 is a bit small for an 8" hole, but the HD-45 and the SK-58 are bigger tools.
Thanks for all of the replys about the core rigs...