"Having done this for a living in the past...I see some room for design improvement/challenges, depending on the objective.1. Instantaneous spacial adjustment is critical for speed and quality,  for this the original lift is a great design.2. Ability to; raise to check and lower the sheet quickly and make adjustments, measurements and cuts to a flat horizontally orientated surface using a drywall square is also critical.3. Joist span is not always uniform, parallel or square. [In the video where sheets are not installed flush to the vertical end walls]4. Risk of sheet damage is higher than traditional lifts. And breaking sheets sucks!!5. Traditional lift designs pivot to allow for horizontal and vertical wall installation, both horizontally and vertical sheet orientation"