If you get the more recent models that have the three digit display then you should not need to do the electronic modification. If you get the older version that has a two digit display and supports a USB appearing as if its 99 floppy disks then YOU DO need to do electronic modifications as shown in this video for a KN5000.

However, it is important to get the right one. The simple Gotek ones costing from about 18euro (from China) work fine. There are a few that are sold specifically for the KN6000 but cost about 90euro. However the issue is getting the right floppy to USB emulator. You basically just swap the floppy with the emulator. then you will find most of this is right for the KN6000 also but its easier on the KN6000 (or mine anyway) as the need to cut cable ties to lengthen the cable isn't even needed. If you look at this youtube video for the KN6500. I did some more investigation (I am an IT person) and they were both right in a way. The information for the KN6500 said this was a relatively simple swap while the one for the KN5000 said that I needed to carry out electronic modification to the USB emulator. I found information for the KN6500 and the KN3000 and KN5000 but those actually conflicted. I recently bought a KN6000 and searched for info on replacing the floppy with a USB port but didn't find anything specific.

Usb floppy emulator software mac