What it does exactly?Simply disables 3D character model in scoreboard while keeping it on in HUDPlayerClass (when playing, with scoreboard disabled).
You can also disable 3D model entirely by simply moving/deleting sbo_script.cfg file.
To execute a config, use this launch parameter: +exec sbo
Place this into /tf/cfg folder inside Team Fortress 2's installation folder.
Script Code available at GameBanana is only a part of what I actually made and for preview only, so if you want to get all files, check the download link of the release I made at GitHub.