Been busy at work and “life”.
In the event you opt to remove the side windows they are very easy to install if you have new seals. All you need is a piece of 550 cord (also known as parachute cord-i have a mile or so of it) and some soapy water and an extra pair of hands. Older seal if reallypliable may be ok, but they may tear going back in (you’ve been informed).
There may be drain holes under the window seals that are clogged. The older models had them. (Perhaps the later models yours being a T3 - doesn’t due to budget cuts or a young Engineer with a “fresh idea”)