Many of the brothers here. DLD is one of the highest level of PE-er. While most of us stopped for a long period of time, he kept on going. A few I knew still went strong into their retirement years. Not sure what they would be doing with their crazy size penises.
I do my routine around 40 minutes on average just using the Length Master. Sometimes I go as long as 60 minutes. I either end my routine with a 20 minutes 5x5x3 girth base routine or I do it at night, all depending where I am in my own program. You can also stagger your routine with morning and night routine if you have time for it. Make sure you always provide at least 6 hours of break in between in each length routine.
At this point, that routine is still a beginner's routine. Look in the Routines and Progress forum. You'll see how most of the brothers here started out and increased their routines within 3 to 6 months. Their routines progressed from beginner's routines to advanced routines. They have to get back to beginner's routines at times because of the long rest they need to take to heal. PE is a very long journey.
We like to use the body building comparison because it's similar in progressive nature. The body is full of hard tissues, not soft like the penis. But the progressive stages we have to move forward one step at a time provides the view points where we can't just skip from one level right into the next without taking precautions. Everything tears, everything gets damaged, but taking a safe route to do things right, the tears and damages turn into gains. It doesn't matter if the tissues are hard or soft, the key is as things break down, the body will attempt to repair and rebuild. You cannot exceed your own body's potential to repair and rebuild. If you don't listen to your body, it will break down and you will end up getting hurt. This is why we document everything in our PE journey. The PE journey is loaded with medical and science methodologies that it's no longer just a growth exercise. It's a biological growth science that goes against nature itself.