Option to change size/location of markerSuggestion
The .cs file does not contain these options. I've looked through the .json file but I don't understand much. The only place that seems to deal with the size or location of the hitmaker is in these lines:

I messed around with these values such as making them all the same but then the hit markers won't show up at all after restarting the server for the changes to go into effect. Also by default, the hit marker for the hit and death are both the same size but in-game the death marker is a bit bigger than the hit marker.
You will have to mess with the anchors of the image. The "0.487 0.482" and "0.513 0.518" part.