Oh man the art took me so long and everybody is disliking :(
thx for telling how to mirror stuff
That woud've been nice to know sooner ;D
you can rotate stamps with R and mirror them with Shift+R ;D
Make only one half, press S, copy it, press L to paste it and before clicking with mouse, press Shift+R to mirror it and paste it right next to the first half.
BTW look how broken the frontpage is. A friend of mine voted up (free will) as soon as I published it and I am on first place!!! PLEASE, FIX THIS!!!