The varied opinions here express what works for some doesn't work for others.
I had a Sabre 190 and moved down to a 170.
I used to roll the end cells into the center and it made for soft openings, that all changed when I had a malfunction caused by one side failing to pop out of the center. It seemed the fabric got stuck on itself somehow.
There is so much more than what you do with the nose that effects openings . I have found that keeping the slider in a position to do it's job as the biggest factor. Snatch force, line stows and proper maintenence all come into play also. You are going to hear tips from everyone. If you have a problem of any kind call the manufacturer, they usually are in the best position to clear up the problem.