Kit 3 follows the same structure as Kits 1 & 4. As for Kit 2, each sample provided by fxpansion consists of 16 channels. Which means for the Mic I called Room Far, we have both stereo (2 channels) and mono (5 channels). When converting this Kit, I had 4 options, 3 of them would not require any script changes:

Option 1: Provide only the mono channels for Room Far
Option 2: Provide only the stereo channels for Room Far
Option 3: Mix the stereo channel with the 5 mono channels (i.e convert the 5 mono channels into stereo and mix them with the stereo samples) .
Option 4: Change the script and provide an extra mic (I called it Amb Mono) and use the stereo channels for the Room Far and the mono ones for the new mic.

To provide the best results, one would choose Option 4 and that's what I did. So I modified both my program used for converting the BFD3 samples into multi files and the Kontakt script to support a fifth Mic.

As you can see from my screenshot, there is now a drop down at the bottom of each Mic. By default it is Master. This will allow you to route each Mic to different output channels. One very important note to those who already changed the routing for each Mic using the instrument edit and Bus Output. If you already created a project in your DAW and used multi routing for any of the instruments in previous kits: After you overwrite your old NKR file with the new one, the first time you open this project, you need to set the output of each Mic from the interface to the one you chose previously. You only need to do this once; after that, your choice will be saved. Same thing if you used Kontakt as a stand-alone and saved the instrument after you changed the routing of one or more buses.

As an extra content, fxpansion provided 6 instruments under Percussion Pieces. These are actually the same 6 instruments that were provided in the BFD Percussion Expansion Pack. These 6 instruments have also been converted and posted here.

All in all, the 7 kits + Percussion pieces in Kontakt amount to 31.7 GB as opposed to (I think) 55 GB in BFD3. I know that here you don't have the flexibility (although it could have been easily done) to play with the Snare Top, Snare Bottom, Kick In, Kick out and Snare Top 2 Mics (as they are all mixed into one mono channel) and also with the 5 ambient mono channels (used in Kits 1 to 4 also because they have been all mixed into one mono channel), but if you are like me and you don't use multi channel routing, and you always set the same gain for these 5 Mics, I think these Kotakt kits will give you the same end result with the bonus of taxing your system less than BFD3 and also having the advantage of using less HD space.