General

Special Mystery Mastery Books after the Red update?

I have quite a few SMMBs on my characters, the ones that allow raising skills to lvl 30 with 100% rate.

From the RED update from http://orangemushroom.wordpress.com/2013/07/03/kms-ver-1-2-196-maplestory-red-1st-impact/
[quote=Orangemushroom]The Mastery Book system has been reorganized! First of all, you will not require skill-specific Mastery Books anymore. You will only need the new Mastery Book 20 and Mastery Book 30 (and the Dual Blade Training Book for Dual Blades' 2nd~3rd job)!

Using these will allow you to choose one of your skills to upgrade the mastery level of at a 100% rate! It even works with Maple Warrior!

A new Mastery Book salesman named Bucklerman will sell the above mentioned books in Henesys and Leafre. Mastery Book 20 costs 7m mesos and Mastery Book 30 costs 10m.

You can trade in your old Mastery Books to Maple Admin in order to get the new Mastery Book 20 and 30.[/quote]

So, my questions are:
0. [b]SMMBs essentially become redundant and are a form of 20&30 books?[/b]
1. [b]Will SMMBs even survive into RED update, or do we only get a 20 or 30 book?[/b]
2. [b]Should I be wary of getting Nexon'd, save my SMMBs, and see if they do something funny with the new Mastery Book update?[/b] (i.e. remove it, screw it up, increase Bucklerman's 7m/10m prices a LOT, etc.)
3. [b]If I were to get the most use out of my SMMBs, what should I do now with them? (use them on any old skill so I essentially save 7m or 10m by not having to buy 20 or 30 books? I know, chump change.)[/b]

4. [b]Specific to my Evan, he has 2 SMMBs. But I'm lvl 131, so I only have Illusion and Maple Warrior. Illusion is lvl 20 already, but I don't have Magic Mastery nor Flame Wheel due to lack of skill books. How should I handle SMMBs on my Evan?[/b]