Thanks to everyone who has shared so much info here. I am looking at building my first E-11 blaster and really appreciate the templates, pictures, etc.
I am a bit surprised by some having difficulty finding the proper size pipe. Those of us in North America who are near a Home Depot should be able to get 1-1/4 inch EMT there: http://www.homedepot.com/p/Allied-Tube-Conduit-1-1-4-in-EMT-Conduit-101576/100400410
Also, regarding 3d printer files, have many of you tried these ones on Thingiverse: http://www.thingiverse.com/thing:868160