Well, I spend the morning tearing apart the rear of my Axis 25.6 to find where my water pipe disconnected from the tank - they don't make it easy; it's built like you'll never have to access anything. I started by pulling the lower drawers out, and you can see the top of the tank, but for full access you need to remove the magazine rack. That is held in place by 8 screws that are very hard to access, and have very cheap (strippable) heads on them. I had to push in the lower glued in panels to access the lower screws; guess I will have to glue those back in or find a better way to attach when re-assembling. I used a combination of various length bits with an impact drill to access the screws; they're buried behind the trip top and bottom.
The good news - the workmanship is so shoddy that they didn't glue the drain pipe in properly! The pipe just cleanly pulled out of the elbow and just needs to be re-glued
Hopefully I'll be whole again after sandpapering the interior of the joint and re-glueing.
Here's a few pics of that area for those who are interested