A few years ago we installed a shower in a bedroom over the kitchen. The shower tray is leaking somewhere beneath the tray at the outlet pipe. The kitchen ceiling now has water damage on it. The walls are fully tiled down to the shower tray with a white plastic inset put in between shower tray and wall tile. Is it difficult to remove the shower tray to find the problem?Will I be able to remove tray without damaging the wall tiles? Is there any quick work around to find the source of the water leak? Any advice would be appreciated.