I'm not crazy enough to crawl under loosely stacked 2x4's. The top layer that has the recessed cuts into it have 16 screws in there alone cause I was paranoid about slipping.
And I just thought the Nixit blocks were for more height. I have some wood leftover and I want to build some type of insert to fit into the top of the block that will widen it out to carefully hold a wheel. I know I could just get higher jack stands but I'm tight on cash right now and I wanted something I could use for jack stands and eventually wheel blocks.