I'm going to run the ducting for my cooker hood through the kitchen wall. It is 150mm, so I need to core drill a suitable size hole in the cavity brick wall. I always try to use rigid ducting if possible, so I was planning on using this https://www.screwfix.com/p/manrose-...V5IFQBh22eQC2EAQYBiABEgInjfD_BwE&gclsrc=aw.ds. However, it seems unlikely that a 152mm core drill bit will be big enough for this ducting, surely the wall thickness is more than 1mm? The other thing is my local hire shop has no diamond core drills in just now, so I was thinking of going for it with my trusty Makita DHR242. It hasn't let me down before with smaller cores, lots of drilling and breaking, but I wonder if this might be a bit much for it? It does at least have a torque limiter so shouldn't throw me off the ladder... Any advice welcome, as always!