Advice for a first time Breeder?

[Dranix Paremoon]

Well, things have been going okay so far. Heat off every night and what not.
Introductions go well each time, no scrapping or fighting. But as far as I've monitored, no copulation.
I do 3 days on and 3 days off for the female, leaving feeding days on their off time.
Last night I normally remove the female and was about to when she started slithering around and wagging her tail. She hadn't done anything that I noticed to be showing herself ready to mate until then, so I decided to leave her in one more night to see if they copulate. Unless they did while I was sleeping, they don't seem to have done anything.
Any tips would be nice. Not sure if I should leave them alone if she's tail wagging, or remove her at the 3 day mark regardless.
I also introduced the males together last week to see if it would help, and like when I first introduced the male and female, I watched for about an hour to make sure no fighting or serious injury happened, all went fine. A little too fine though; no male neck wrestling at all. Maybe my other male is still too small. He's about 800 grams, the one I'm working on breeding is about 1100.