Instead of putting the sponges under the waist and knees, introduce as much bend in the back as possible then deal with that with tube angle. This standardises all backs of all shapes and sizes an builds knowledge that allows the development of high levels of skills. Never use centring points. Instead, use accurate collimation. kzbin.info/www/bejne/aoiUmGOLi7R6p5Isi=xXT4MFHjzOT7AHOf and my usual standard for lateral lumbar spines of all sizes kzbin.info/www/bejne/aGaYi2uaqbWBps0si=147y1V9pci_yk37b