I was out on my Catalina 22 this weekend and gave this a try. All I can say is that I feel silly now for not doing this before. It was so easy to keep trim my jib sheets using thus method. I'll definitely be cross sheeting more often next season.
Glad you liked it. Also don't forget that if you happen to forget and leave the winch handle down below like I did yesterday and the sheet is too hard to pull in by hand and you don't want to luff cross sheeting gives you a way to pull it in.
Just take the tail in one hand and use the other hand and grab the sheet right in the middle between the two winches and pull straight back towards the stern. As you release pull in the tail. This way you can sheet in without a winch. It is called sweating the sheet and was a very popular technique in the days before winches.