On Sat, 20 Mar 2010 21:51:44 -0400, wrote:

Spring loaded and a helix shaped rod?
I suspect so, but was looking for someone who KNOWS Pella.
I've had some window experience - but not Pella specific.

Check Pella in Canada:

Canak Windows and Doors Toronto, Ontario

http://www.canakwindows.com/pella_windows.html