Windscreen frame has to come out. That means front sections of the cage off, roof front and middle sections disconnected. you might be able to pry the roof up enough to get the windscreen frame out. There are spikes on the bulkhead that keep it in place so it has to go up before it will come out. "Might" be able to pry the roof up enough, but you liekly will have to take the roof section almost all the way off.
Short answer... there is no easy way.
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