Plutonium

if i good remember, you need start a game and then invite friend to game. Lobby doesnt work on t5.
all informations got on plutonium docs. (docs/custom-games/#t5)

(sorry i cant paste links)

probably you have it turned on sync every frame so turn off this, and u can change fps in console.

https://youtu.be/KSWRu9b_1-4?t=3