Also, for others considering the pavers- I located my pavers by assembling the top ring of frame, and then putting the pavers under the leg joints, then removing top ring and digging in & leveling pavers and setting elevations with water level. I agonized over where to put pavers relative to the legs- allowing for the legs to move outward some, I biased the locations towards the inside edge of the pavers. For the most part this approach has worked fine- but I do have several pavers that I may have to move a bit now that I have pool assembled. I contribute this to the frame not being perfectly round when I assembled it by itself. I discovered my pavers were not perfect when I cut my foam round. After my foam was taped together I put a nail in the middle of my foam and used a piece of fishing leader wire to the desired radius to scribe a perfect circle to cut my foam. Centering the foam disc on my pavers revealed some of them were not perfectly located on a circle. I think the frame depends on the liner and the weight of the water to push it out round when it is filled. The 'play' in the joints of the top frame by itself means it wont be perfectly round when assembled by itself. Just something to consider that if you can measure, or check roundness of the frame by itself before marking paver locations you may save yourself some grief later.
The locating, digging in, and leveling of the pavers and pool middle was an arduous task. Took me a couple weeks working on it as much as possible to get it done. If I had it to do again, I would STRONGLY consider paying someone to come and pour a round concrete pad to put the pool on.
overkill? maybe. But a ton of aggravating problems would be solved in a few hours while you watch and sit in the shade and drink lemonade.