[JFreak]

You can set up a download if you wish me to take a look/listen but if you have your click track as audio then any tempo mapping or playback buffer has absolutely zero influence to what someone records while listening to that audio track. Only thing that may screw things up is sample rate mismatch. If some drummer is thinking he is playing to your click and has wrong sampling rate on session, then the recording will playback too slow or too fast on your system.