I string loads of badminton racquets but have never prestrung anything more than the mains. Perhaps I will give it a try on the weekend and also prestring the crosses. I could see it as being a benefit with all those shared holes.
But....would it create enough friction when tensioning the mains (with all the crosses already in) to decrease the actual tension you are pulling? So if I want it to be 22 would I need to pull at 23....or more??