The plan is to dig a couple/3 inches down... place patio blocks in the 4 corners and in the center... fill all around w/course gravel... anchor hardware cloth on top of that ... and then place the ready-made resin floor on top of all this. In heavy rain there is a small river that flows along the side of this area... I am hoping that the patio blocks will remain stable and the gravel will take care of draining this away quickly... the hardware cloth is just another barrier to keep predators from digging from under the coop. Any flaw in my thinking?