1.) The top reason is because vol 1 to 3 done by me is really really horrible. I am no perfectionist, but it irks me to see them like that should I want to continue with vol 4. I'll redo all of them if I have the time. But I don't (because I have real life commitments).
2.) Anime has covered quite a bit of material from the later volumes here and there.
3.) I want to clear SPS first, because I may not continue with this blog once I get a job and start my work.
So there. I don't really want to hog this title (though I never had the intention to do so in the first place, and has even asked people to take it over or redo it from scratch), so I am announcing my decision officially.