It's not latency. I think he can manage to play to a metronome, but not without guitars. So just metronome is not working at all

He sais to me that he want's to track the whole song in one take and I've mentioned tracking in pieces but he rejects. He wants it to feel natural..
I'd had in mind that I would take the metronome in ear, go out, play with him.
But then it would be double work for me..
Can it be, I wondered if he makes the drumparts, to difficult.. I know he has Travis Smith (Trivium drummer) as a favourite drummer.