NK3 flashable zip, HLOS, NK3 modem on NF9 topic

3 Qs:

1. Looking to get the NK3 modem on a stock-ish NF9 build and kernel. Any problems?

2. Not clear on whether HLOS is needed or what it even is?

3. Cannot find an NK3 flashable zip modem, only .bin (that presumably needs ODIN).

Thanks.