I'm in the process of making an oak kitchen table (approximately 50inches by 36 inches) The tabletop has been made using 1inch oak boards and an apron placed. I've decided to use two 3.5 inch posts using corbels as feet for the table legs (the kitchen has a booth style bench so I'm trying to avoid four corner legs). Where I've hit a snag is how to attach the posts to the underside of the table. I figured I could attach a square piece of lumber to the top of the post and then screw it into the underside of the table but id like to be able to tear it down if need be and I'm afraid using screws to the underside of the table would make disassembly and reassembly risky. So I've thought about using threaded metal inserts either into the underside of the table directly or into a second square shaped board fitted to the underside of the table. Then I could bolt the legs with attached square to the base and easily tear it up and down...thing is I have no experience with these threaded inserts. What size to get what type bolt to use and if this would be strong enough to hold the heavy table top. Any thoughts would be greatly appreciated.