I know it's an old post, but I'm replying, since I did the spacebar mod myself. Actually it's quite easy and straightforward, you just take the spacebar off, you reverse the plastic pieces that hold the metal guide bar, and put the whole thing back bacwards, and you're done. There is one catch though! Beware that the above guide is slightly misleading, when it says "Don't just twist the guides with the pilers though, or you'll break them." In reality you don't twist them at all! The attachment hole is cross-shaped, so all you can and have to do is just pull them out straight. They come off easily, but don't twist them. That's the only trick to it really. Other than that, if you know how to take the spacebar off (which you can look up on youtube), it's easy.