I had a leaky heater hose quick connect i swapped out with little issue making sure not to damage metal hose. Decided to do flush as well with distilled water disconnecting lower hose only from engine side, not radiator side. I think i flushed 4 times. Afterwards, i seen this leak In the back of engine bay near a cylinder and metal hoses. It leaked worst with heater on. I checked car in morning and seen the reservoir slightly lower from top, i may have over filled a little. Will check again today but i would hate to think something else is wrong. I was very gentle. Here is video after flush done.