mcdave555 wrote:I use the vaccuum pump at about 8 inches of murcury for 1/2 hour or so and put a cock ring on the outside of cylinder, when I have achieved the length and hardness I slip the ring off and release the pumps vaccuum, it stays hard for 1/2 to 3/4 of an hour or more
You mean you stay in the device for half an hour and then you have the hardness and go on eith a cockring for an hour or more? Good job!