Lately I have been trying to sort out how to update an older treatment chair in a small therapy space and ran into an unexpected issue with its height and backrest movement because the current mechanism feels too limited for smooth adjustments. I thought it would be simple to replace a few components, but the more I look into it the harder it becomes to understand what type of electric motion parts would actually fit. Has anyone here ever modified similar equipment and can share what direction to look toward without going into overly complicated engineering solutions