Hackintosh decluter, day 1: USB

So, I have 2 hacks:

• Z97N-WiFi, High Sierra - initially Sierra (with MultiBeast), then updated to High Sierra, later updated to High Sierra Suplemental update
• OptiPlex 3020 - Sierra, vanilla install (inspired by /u/corpnewt guide)

I would like to declutter my MultiBeast installation a bit. Today I want to take care of USB. My questions are:

1) in MultiBeast, Drivers -> USB -> 7/8/9 USB Support, installs USBInjectAll.kext?

2) in Multibeast, Drivers -> USB -> Increase Max Port Limit 9 Series, modifies config.plist and ads this section?

 <dict> <key>Comment</key> <string>change 15 port limit to 20 in XHCI kext (9-series)</string> <key>Disabled</key> <false/> <key>Find</key> <data> g710////EA== </data> <key>MatchOS</key> <string>10.12.x</string> <key>Name</key> <string>com.apple.driver.usb.AppleUSBXHCIPCI</string> <key>Replace</key> <data> g710////FQ== </data> </dict> 

If so, how come MatchOS version is 10.12.x but it also works in High Sierra (10.13)?

3) After I move kexts from /Library/Extensions to /EFI/EFI/Clover/kexts/Other, do I need to run any terminal command, like clear caches or something? Or is it that moving location of kexts is enough?

4) In the Kexts folder I have FakePCIID and FakePCIID_XHCIMux? Do I need those? What do they do?