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Here in New Mexico we have to run UF in the adobe walls, real pain in the caboose.

Well, welcome to Continental European wiring! [Linked Image]
The only difference being, most of our buildings (except for some rural farm houses) are rock solid brick instead of adobe, including all interior walls.
You either need a slot cutter (basically an angle grinder with two parallel blades and dust collector) and chip out what's left between the two cuts (very common in Germany) or a rotary hammer drill with a flat chisel bit (most common in Austria, less dusty and less likely to hit live old wiring). In the old days they did everything with a cold chisel and sledge hammer (usually 4lbs.), for smaller jobs that's still used.
On my summer job we channeled rock solid brick walls for 2 1/2" conduit with hand tools. Go figure...