I've recently started playing at an 'open deck night', DJs version of an open mic. One of my mates runs it and because some djs use cds, others vinyl and some serato and laptops, the setup and mixer changes every week. I know EQing and faders will be similar on most, but things like headphone cueing can make me trip up. I was wondering, for the djs who often play different venues, do you have a basic knowledge of most mixers, obviously DJM/xone go without saying, or is it just a case of practice, watching the dj before you then trying to figure it out as you go along. Luckily it's quite an informal and relaxed atmosphere so it's not the end of the world if you try to cue something and it ends up coming out of the master lol.