Board Thread:Game Updates/@comment-1820055-20150913021552/@comment-26348726-20150925023543

The language used in the tweets was pretty straightforward, why so little confidence in them D:

「※「改」から「改二」への改装には、試製甲板カタパルトと改装設計図が必要です. 」, so both the catapult and the BP will be required for the initial remodeling from Kai to Kai Ni. (But if we assume that 「改二」 solely refers to the version without the catapult, it probably means that you will be required to have the catapult in your inventory before remodeling from Kai to Kai Ni, but the remodel itself will not consume the catapult, given that the catapult is most likely required for the conversion from Kai Ni to Kai Ni A.)

「※「改二甲」から「改二」に再改装することも可能です. 」Simply saying that it's possible to remodel Kai Ni A back into Kai Ni very much implies that the remodeling process is something as simple as removing the catapult from Shoukaku (and placing it back into your inventory). At this point, it's implicit that no further BPs will be required for any remodel, so it's just basically free K2A<->K2 with the equipping/unequipping of the catapult.

「※「改二」及び「改二甲」には初期艦載機は装備されません. 」To me, this is a pretty conclusive-sounding statement that neither the Kai Ni nor the Kai Ni A remodels will come with any stock equipment, no matter whether it is the first remodel attempt or not.

「本日実装される「新任務」をクリアすることで、同艤装を新たに入手することも可能です. 」Pretty straightforward here, you absolutely will be able to obtain it in the new quest to be implemented in this update. Also, 「※これから五航戦を編成する提督も入手可能です. 」, so new admirals will have the same opportunity to obtain it as well. However, 「※任務はある程度時間が掛かります. 」, so it doesn't look like we'll have it easy :P