On FastCup, never use rate 25000 on a 100-tick server (most are 100tick). Use . If you see yellow choke in net_graph , increase rate to 30000. If you see loss , lower cl_updaterate to 90 or 80.

: Bypasses Windows' pointer speed settings for a 1:1 mouse-to-game movement.

FastCup used custom rules and an anti-cheat client. There is no paper, but you can find: