When using your male edge extender, increase the tension on the screw bars every 15 mins. Start doing this from your second 1 hour set of the day.
Let's say you plan on wearing the extender for 4 hours a day, during your first 1 hour set, wear the extender at a normal tension and don't increase the tension throughout the one hour set.
Your second set, is when you start increasing the tension every 15 mins. In a one hour session, you will increase the tension 4 times.
Do this and gains will come quicker with that extender.