Interesting. On my first attempt I had the inner setup in probably less than 2 minutes. Insptected everything, opened it up, laid in it, etc. Next I draped the fly over the poles, connected each end and then the corners. Probably another 2 minutes, tops. I walked around and tighted the fly down and didn't like how the center seem was way off of the center ridge line pole, so I unhooked it to see what was going on. I decided to use only two of the velcro tabs (the ones that line up with the hubs) on the inside of the fly to keep it lined up, which is something I've always skipped on other tents using these. Re-connected the fly, tightened everything up and all looked good. Once familiar with the setup, I can't imagine it taking more than 5 minutes all together. All bets are off if it's windy, raining, and on a rock slab though…
Re connecting and disconnecting the fly to the corners. I used a bit of a side to side rocking motion and yes a bit of "brute force," but nothing that I felt was difficult or at all concerned with. I'd say give it some umph and don't worry about it.