« Last post by eddie on 27 Mar 2017 at 14:00 »
As I said in my previous posting, I would be inclined to fill the window in the quadrant. Early Douglas parts (including the kickstart quadrants) tended to be somewhat lightweight - resulting in some premature breakage. This was probably found to be the case with the EW - hence heavier weight, solid quadrants on later versions. Having been welded and still having the window, your quadrant will be a little softer and more prone to flexing under load - filling the window will prevent that flexing.