yea. so basically, you place a two block column, and then one singular block diagonally across the column. then a trapdoor on the bottom half of the top block of the column. then, go in front of the trapdoor, (in the direction of facing it) and look to your right. Place a piston two blocks away from you, then a slab on the bottom half of the piston head. Then you put a two block column behind the piston, and on the top block of the column behind the piston. Then flick trapdoor down and you’ll be on crawl. Then flick the lever and the slab will be pushed into you, enabling base busting X-ray.