We received ours ahead of schedule. The hot tub is full but we managed to get the slider underneath the hot tub by using one man on a dolly, lifting the hot tub edge up ever so carefully, while I sat on the ground, pushing it with my feet until it slide underneath. We figured out that the yellow leaves that come with the kit are used for 'wedging' any unblanced edges. We used shims instead but will keep the leaves in case. So far so nice!