So I am replacing a return on my gunite pool. I am drilling a 2 inch hole, for 1.5" pipe. I was contemplating using a 2 part epoxy like RCF. I've googled this extensively, and found almost zero info on this. From the very limited info I found people use hydraulic cement. If I use hydraulic I am a little bit worried about how well I can Pack into a hole that does not have alot of clearance, making a bigger hole also seems to increase the chances of it leaking. I've read about the theoretical greatness of epoxy, but I haven't really seen people say they have used it for this sort of application. Any advise from the experts would be appreciated.