I saw that in some of the posts, you guru's say to first pop up the roof....THEN lower the leveling legs on the 4 corners? is this because the leveling jacks will throw the roof/straightness out of kilter or cause the pop up resettles itself once roof is up? Just curious as to why it's in this sequence. Thought that "once" you set the levelers on the 4 corners down...the roof could then be popped up but is that not the case? Looking forward to openin' her up this weekend. Suppose to be 60+ this weekend!!!!!............FINALLY!!