This is a great I dea, I have a full 5 point harness that I just opened to verify the weight rating& size. It is a Large and has a wieght limit of 300lbs. Is someone needs it, send me the mailing info and it is yours.
On a side note as we continue to do this, Pleasse remeber that harnesses do have rating for weight and this is not your body weight, but total weight, meaning you need to add in your boots, clothing and any gear you are stuffing in your pockets, when it doubt, make sure you go on the larger size for weight.