Same issue.
I own a Phallosan Belt, Phallosan Plus metal Rod extender, a Total Man Vacuum Weight Hanger and a Penimaster Pro vacuum metal rod extender.
I have not tried the Total Man compression weight hanger yet as thus far I have been all vacuum and will reserve the compression hanger should I ever get a blister from the vacuum on my Glans, but will have to watch a few tutorials on proper wrapping and take note of the 20 minute time max to avoid damage. Vacuum can weight hang longer for 30, 40, 50 minutes without damage other than edema I have noticed since I embarked on my hanging starting on October 1st.
I picked up a Penimaster Pro vacuum metal rod extender after watching a couple of YouTube videos by Baseem comparing the Penimaster favourably to the Phallosan.
At the end of the comparison video Baseem also claimed that the Penimaster increases the size of the Glans Head. That latter claim on a bigger Glans head prompted me to shell out about another $350 for the Penimaster.
I have the same issue with air leakage.
My head slips out immediately when I attach the Glans chamber to the indentation on the metal rod extender.
My initial thought is that there might be a flawed design. The Glans chamber comes in two hemispheres that appear to be glued together. My initial thought was that I attempted tooo great a stretch on the metal Rod extender and that this somehow created a micro separation between the two hemispheres creating air leakage.
‘I tried different sluece sizes and tried using the plastic pieces to make the hole smaller.
No luck.
It has therefore been collecting dust in my drawer since early September.
I emailed the MSP Concept GmbH & Co. KG E-Mail: support@penimaster.com asking for advice other than buying a new one yet they failed to respond. Typing this thread has prompted me to send off another inquiry in an attempt for them to salvage the relationship.
Reading this post above it seems as if another user attributes the air leakage to the green bulb air suction squeezer. I no longer have the mouth tube that came with it but will search my house again and double check the Total Man to see if it came with a mouth tube version as well. The black Total Man air squeezer by the way works exceptionally.
If I find it I will try that to see if it works which would then narrow the issue to the green bulb tube.
If I cannot find the mouth tube then I will wait for MSP to respond to my email(first email 3 weeks ago, 2nd email a few moments ago) to see if they have a minuscule of proper customer care. If no response then that will be it with Penimaster. I am a walker not a talker as I own two great alternatives but will talk them down on forums like this in future should they not respond.
If a response is received and I do not locate the mouth suction tube I just MIGHT give Penimaster another chance and place an order for 1): replacement Glans chamber, 2): new green bulb air presser and 3): new mouth breathing tube.