Come on guys,give the poor guy a break. He's learnt not to try a core drill on ply, so he'll know better next time. He's only going into breeze block, so as long as it's not a £30 Lidl cordless drill, it may well cope, and there's only 20mm of render at the end so it might well survive. At the end of it, if the drill burns out, he'll know to get a better drill next time, so it'll have been a good learning curve all round for him.
There are some questions you just shouldn't ask.
