For me, the actual "come" command is my warning. If you say come then warn them, that gives them extra time to think about it. I prefer immediate compliance, but like you said everybody is different. I have a tone on my transmitter, but I use it as positive enforcement. I use it when the dog is doing well and I just want to remind them that I am nearby. I beep on it and they know it does not mean anything bad.

Thanks everybody for the replies. I hope somebody might be able to use some or all of it if they've been having some trouble.