Sunroof drainage question

[Lawz]

Hey, first post ^_^

Recently had a problem with the sunroof, would leak from the winding handle, after taking it all off discovered its a combination of a slightly shrunken top seal (where the glass sits on the sunroof when closed) and the fact that the left side drainage isnt working properly.

Spend most of yesterday getting the headliner out and then removing the entire sunroof assembly (quite surprised I could, its my first car and never done stuff like this before), tried sticking wire down the holes to clear it as suggested on here, but the wire would simply stop at about the bottom of the windscreen, same on the other, unblocked side, which says to me that the large tube goes into a much, much smaller tube, or goes round a tight corner or something.

Anyway, my question is does anyone have a diagram of where the drainage tubes go after they exit the front pillar, e.g are they best accessible from the outside of the car (removing wheel + wheel arch to access them) or the inside (removing carpet or something), ive tried very thin wire, wd 40 (incase it was rust blocking it, where water sits in the sunroof due to the drainage holes not being at the bottom its really rusted, some may have gone down the pipe) and unblocking fluid, but it aint budging

Any help or advice would be greatly appreciated ^_^