RED micro-site now out!

 Spoiler

I roughly give you guys the idea on what the NPC says, since my translation is not as professional as [MENTION=5956]hadriel[/MENTION]

1st image
Through upgrading, you can carry over the effects of the equipments you own now on to the lvl 160 set.

2nd image
First, the equipment which its effects to be carried over is known as “Material Equipment". To use "Material Equipment" , you must fulfill the following criteria:
1. The equipment's potential rank must be rare and above.
2. Unidentified equipment cannot be used. (means you do not reveal the potential stats)
3. The equipments used must be either lvl 140 or lvl 150 set. (never mention anything about Japanese Myth Set and Tyrant Set apply or not)

2nd image
Second, the equipment which receive the effects is known as "Resultant Equipment". Only lvl 160 Whirlwind Set can be used as "Resultant Equipment".

3rd image
Third, there are a few requirements:
1. Upgrading system can only be used on same type of equipment (Means overall --> overall, shoes --> shoes and etc.)
2. While upgrading, only potential ranks can be kept, but potential stats will be reset.
3. Enhancement effects will be kept the same, but the star symbol will reduce by one, so that the additional enhancements can be carried out. (doesn't quite understand this)
4. After upgrading, the resultant equipment will become untradeable. (no mention of Sok or PSok)
5. The effects of unboomed (?) scroll and Lucky Day scroll cannot be carried over.

So if i'm not wrong, you must get your hand the Whirlwind set first before you can carry over the effects of your Empress set and Root Abyss set.

Just here to say that according to the image, what you said seems right.
Only mistake you made was you said 2nd image twice and 3rd image should be 4th. =)