I had to drill a 4 inch hole through a three foot thick external wall, for some cable ducting ( listed building so a right bugger, and a weekend job due to noise levels)
Cotswold stone be a doddle
Er no
hard as a hard thing, turns out one particular variety was used for the large structural sections
Put a 4 foot 12mm sds through first after a great deal of measuring and much guesswork
Mmm didn't quite go as planned
But on the upside the mess from the 117mm cutter would have been harder to disguise if I had gone through with that
A looong day for me
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