Hi all, I'm after some advice please. I'm looking install a set of softwood driveway gates, one side would be against a brick wall and the other against an existing, concrete fence post (which is 90mm wide, 1100mm thick). There are no pre-existing holes to use. I'm looking to attach some 4x3 timber as posts, from which the gates will be hung. I've done some 'Googling' and aware that concrete posts can 'crack' apparently, so planning to start with a 5mm drill bit and work up accordingly, which I hope will minimise the risk of any blow-out/cracking. In terms of fixings, for the brick wall side I'm planning to use 120mm masonry bolts, countersunk into the timber. When it comes to the concrete post, I'm not entirely sure which way to go, and would be grateful to know if anyone has done this already. I could probably use coach-bolts, but conscious that'd mean drilling all the way through the post, circa 3 times... maybe the masonry bolts I'm going to use on the brick wall would be okay too? I'd welcome any thoughts/suggestions! Thanks in advance.