Hiro, I totally love these cards that you're making; they are a wonderful reference. Although I must admit I haven't printed any out yet because I just got into this awesome game.
My suggestion tho is for your future cards, use the hi-res SST logo instead of that low-res angled SST logo. I think it looks so much better on the few that you have done with the high-res logo. But by no means am I saying go back and redo the old ones just for the logo, but for the future, use the hi-res logo.
Thanks and keep up the awesome work.