Hi, I had the same problem, I started with a standard cordless drill & the bit just spun all over the inside of the pipe. I got a bigger mains powered drill, put all my weight behind it & pushed like f**k! This is why I had to go more to the back of the pipe as there is no way I could have put a hole where crioas did with the tail pipe on, couldn't get the angle. Does anyone know what is directly behind the hole I've made as per my previous post?
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