Thank you Lyn for your reply.
I'm doing about 10 minutes a day at the moment. Slowly at first, releasing the pressure every 2-3 minutes and then maxing the pressure. I'm surprised by the effect, just worried the skin is getting a bit pulled.
Chris J, I’m circumcised as well. The leading edge seems to form a seal with the tube inner, so I wonder what the vacuum is working on...
Cheers
Hank j