I built these. I can't remember what kind of paper I used though. On my last purchase of paper, I went to a real paper warehouse here locally and bought it all by feel.
And ekuth is right, printed as downloaded, thay are a
tight fit!! Mine worked, but I am very tempted to build another Type I (if I ever have time/energy) because every time I pop them apart it scares the heck out of me that they maight not go back together without some damage...
I know it's a horrible thumbnail, but here's a link to my phaser builds.....