most levels have serious lag, i know its not my comp and ive done everyting to include changning my refresh rate and netgraph but there is still to much lag on ZM, very glitchy. its not just me though its most people. ive showed alot of people how to change the control time from the comp to the server but still no dice. anyways i think there is just to many people on the server or it needs to be updated. anyways here are some ways to make your comp faster to change the speed from your comp to the server
CL_updaterate 10
rate 20000
net_graph 3
fps_max 999