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You can definitely get extra long SDS bits, I've got one of these.
https://www.screwfix.com/p/erbauer-sds-plus-shank-masonry-drill-bit-10mm-x-1000mm/413hyIt wasn't actually that unwieldy to use, I think your main problem will be making a big enough hole to get the drill and bit in to start off.
Bright ideas and simple solutions wanted.
tl;dr is there an easy way to drill a 90cm tunnel under paving
I can work out how to run the cable neatly around the outside. The problem is how to get a cable across the footpath? I'm wondering if there is some sort of extra long sds drill bit I could rent/buy to span the 90cm path, then dig a hole in the bed either side and drill underneath, possibly running a bit of metal or plastic conduit to maintain the structure of the hole.
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