Remaping channels on 9900

I’m a newbie to this forum and am just converting an older 9900 to Pro inks
I’ve watched the linearization video to get an overview of the Pro tools.
I’ve also checked the short remapping video and I think I get the idea.

Given the inset I have purchased:

UltraHD MK
HD PK
CT DG
CT MG
CTLG
WT DG
WT MG
WT LG
GCO

It looks like the ink placement is the same for the 9890 and the 9900. In the 9900 the chosen ink set the orange and green would be free.

I have a dead PK channel, so I plan to put the HD PK in the Orange channel and the UltraHD MK in the Green channel. I’d just like to check if my understanding of the remapping process is correct.

If I print on a photo paper like Platine Fibre Rag, I remap the K cure to the orange channel (HD PK), making green NULL and original K Null.

If I print on Rag Photographique I would remap the K curve to the green channel (UltraHD MK), making orange NULL original K Null.

Screen grab attached showing my modification to a Platine Rag curve.

Have I got my thinking correct?

Are the curves I should be using are the 9900 Pro K4?

Many thanks, I want to make sure I set the inks up in the right carts.