Fecking sweet! That is seriously nice. And I love the elegance of the hack! I too looked at jScrollpane, in fact tons of JS scrollbars, for the edit tool on camen design and they all sucked completely. That’s why I abandoned doing it in JavaScript and hacked a left-sided scrollbar instead. I love the way you’ve approached this problem, not accepting existing solutions as good enough and taking the idea a whole new way. Great work!

Please do a full write up and share the code!