You would need to at least add the Corkscrew to your practice along with manual jelqs and stretching. I have seen some minor gains over the years using these devices with off and on manual techniques included. The Vac-Hanger we are working on is now a part of my daily practice since the last 5 weeks. As an advanced technique, it takes some time for the beginner to condition the tissues to the stresses of vacuum hanging. I have measured a 1/4″ flaccid stretched length gain with improved flaccid hang and a slight measurable gain in erect length. I am finding it to be addicting and it’s tempting to amp up the intensity but this needs to be tempered with patience and a commitment to the program template we are currently working on.