A Graflex build is not the best place to start for your first build. Even the Korbanth Graflex 2.X kits require additional work to turn into a saber complete with lights and sound.
If you want a duel capable Graflex, you'd want to go with a Korbanth 2.X and purchase a separate 1" blade holder. They come with a 7/8" blade holder. The 7/8" blades look great, but are no where near as durable as a thick walled 1" blade.
Alternately, if you dont mind some screen accuracy concessions, the SF Graflex coming out looks to be a good consideration for a duel capable saber and may be an easier install than any of the more accurate Graflex replicas.