Hi all. I'm looking to purchase some movie theater style seating from http://seatsandchairs.com for my very modest theater room. The problem is, I don't want to bolt these chairs to the floor (it's a concrete slab, and I plan to sell the house in a 2-3 years). There are places on the net which sell metal plates to bolt the chairs to for about $65, so those are an option. But I've also read you can use plywood to make your own floor plates. I'm wondering if anyone here has experience with this or any opinions on materials, construction, etc. Thanks.