Typical! 4 weeks ago i got rid of an Expert so I don't know if it fits inside.
Like I said there are 4 x 6 foot sections and 2 x 8 foot sections.
The least you would get away with is just over 8 foot if you split the poles and took the brush off.
With all 6 sections and a brush set up ready to go you'd probably be looking for about 10 foot of available space.