Buyer beware

I loved the mod at 59 minutes where he added the "ledge" under the lifting plate so that it was not only lifting at the bolt points but by cupping underneath the corner! What a simple but great idea! Why don't the manufactures use this??? It would cost less than a dollar to add and would make a huge improvement. It's like when you build a deck- you don't just bolt the cross member to the post. It's better to notch the post and set the cross member on it, then bolt it.