A question for anyone who knows film camera test procedures. I recently acquired an Arricam LT and am wondering if it is it possible to perform a steadiness test by shooting a couple of hundred feet, fixed lens, camera on tripod, pointed at a Siemens chart. Then cover up the lens, put the camera in reverse for the same length, then dutch the chart and expose a second pass? Or is it essential that I remove the exposed first pass footage, re-spool it and thread it again for the second exposure? Thank you in advance for your wisdom.