Bertil
Check this site: http://www.xs4all.nl/~lommen9/index.html Jo Lommen has a very solid and nice Speed Graphic lens board for this interesting WWII lens (Kodak Aero-Ektar, 2,5/178 mm), and a new quite cool lens hood. As I understand he is on his way to develop a fitting filter holder to this lens. The site has a lot of interesting Graflex information.
//Bertil
//Bertil