I have been riding three of the last four years, usually to work to and back. It is just over 7 miles one way. For the last couple of years I notice that by the time I have made that short distance I am usually numb in the groin area. I would like to start riding longer distances on the weekend but until I can keep from going numb I am not going to. I saw a seat online called the Spriderflex, does anyone have one of these or now if it or similar types help? Thanks for any help.