a document about the HCB investigation put together by @ConeBone,  with a summary of the features in the HCB build
https://docs.google.com/document/d/1sNvp5r1-CsOQM3g--A2vMhICooMVy0C7g7hpYqOrEMQ/edit

"Inconsistent Inputs Proven Through MACRO's", by GalactixJR:
https://www.reddit.com/r/RocketLeague/comments/8c9dla/inconsistent_inputs_proven_through_macros/

Previous reddit post, also by GalactixJR, about inconsistencies - which got a reply with an explanation from Psyonix_Corey :
https://www.reddit.com/r/RocketLeague/comments/8alpv4/someone_finally_proved_heavy_car_developers_must/

a comment that we have from G2 Rizzo about heavy car bug - testifying that he felt the game was much smoother on a LAN build. Once again credit to GalactixJR:
https://imgur.com/a/K26Iu

KarbonIced CPU finding's. :
https://www.reddit.com/r/RocketLeague/comments/86kt3o/hcb_workaround_network_ports_and_file_locations/

"The physics and networking of Rocket league" by Jared Cone at GDC 2018. a must see if you're doing some research on HCB.
http://www.gdcvault.com/play/1024972/It-IS-Rocket-Science-The

Another attempt to suggest a possible fix for HCB, this time involving changing windows registry files.  by KarbonIced:
https://psyonix.com/forum/viewtopic.php?f=34&t=34488

Older github posting by a user who compiled info regarding RL server-game interactions. Many definitions are contained.
https://github.com/e00E/Rocket-League-Api/blob/master/rocket_league_api/rocket_league_api.py

"Known facts about game internals" a page summarizing useful information we got from @ConeBone , by @mag.py 
https://gitlab.com/heavycar/research/issues/2

Bakkesmod WIKI :  (player position coding works - other stuff is outdated):
http://bakkesmod.com/wiki.php