Ok. Have to admit that my first attempt with "the rubber ring" was a shocking experience. That thing snapped me like a bear trap when I pushed it off the cylinder. (Glad I didn't use either the smaller nor the high tension rings!)
Felt bruised for a couple of days and wonder about permanent nerve damage (just kidding about the nerve damage, though I did have some random sensations that made me wonder.)
Using the Osbon Erecaid Esteem pump and the standard "large" ring that came with it. So, all you experienced pumpers, any suggestions? Or, do I just have to get used to the SNAP!