Well i got it full, i waited till i was over the cove a couple inches then started taking it apart three top rails at a time to secure the liner . Only a couple small wrinkles. I think it turned out preatty good for four rookies that never did it before, when in doubt follow the directions! I think i know the answer to this but i need to ask, i have two small spots where the liner wasnt pulled correct and i have like a bubble - wrinkle between the top of the water and the top rail in the curves. They are only about a foot long and i can live with it but to make it perfect is it safe to pull a rail or two off to fix it with the pool full? One more ?, i got some wedding cake steps and need to know can i put it right on the liner or should i put something under it to protect the liner? The person we got it from said he put it right on the floor as is and the directions dont tell you. Thanks for all the help,Scott 18x34x48'' older doughboy