Anyone try the TL783 for high voltage regulation?

[Ripthorn]

I am starting a tube project with relatively high voltages (~65V) and spotted this on mouser http://www.mouser.com/Search/ProductDetail.aspx?R=TL783CKCSE3virtualkey59500000virtualkey595-TL783CKCSE3.  Has anyone used one for high voltage regulation?  They seem to be a quite nice looking device for this kind of application.  A little heatsinking and you can regulate 100V down to 24V no problem.  Thoughts?