I put the driver side seat all the way up and tried to fit the rolled up top which is in the bag back there. It doesnt fit, but it might if I wanted to try to force it, which I dont want to try.
The problem is that the passenger seat doesnt go forward, so there is no way to put something behind it, and then move the seat back. There is only a few inch gap behind the rear passenger seat and the rear bulkhead that you would have to squeeze things throught first.
You might be able to get it to fit it it isnt rolled up and in the bag, but then the interior might be prone to damage since it might scratch the black rear panel or the seats if it is loose and rattling around.
You might want to see if you can fold the top in half, and tehn put in in the trunk on top of the other stuff.
Just be very careful. The trunk is right next to the engine. I had about 20 8x11 bubble wrap envelopes with stuff in them that I had to mail that I crammed into the trunk until it was full. It would be easy to have something slip and go into the engine compartment.
I have the insulated touring pack top, so it is thicker than the standard top. Anyone with a regular non-touring top able to get it to fit behind the seats?