[spencerjford]

Hi there

The refresh rate matching, do I do that in Kodi as that is enabled already, or in the madvr settings itself? Any tips?

Display scaling is an interesting one, almost certainly is the answer. Why?

 Disable screen display scaling in windows on your tv for one.  Kodi is not very aware of display scaling.  It's better than it used to be, but it's not there yet, especially with the dsplayer builds. 

Next, you can use kodi's built in refresh rate matching or in madvr settings.  (easiest to do is where ever you have put madvr, run madHcCtrol.exe)   You can find all the madVR settings in that and change what you need in there.  Including refresh rate switching.