I didnt hang around - i put them together straight away - personally i think this is the best thing. They were going into a new bigger cage anyway so everything was new so didnt need to worry bout that.
I put them on the living room floor together , giving them plenty of space and just let them have a nosey, obviously standing by for fights. At first I was really nervy and they were doing stuff which i was panicking bout them fighting, but I'm glad i left them and didnt get too over protected as they got on so well! it took them about 2 hours to be at ease with one another! I didnt separate them after that too, i dont think this should be done as they are getting used to eachother and i think taking them away is just messing up all the hard work they have already done, and then the next day, they will just have to do it all from square one again!