Thanks Dave. My Dad is 73, but he's in very good shape, thanks to no drinking or smoking his whole life. I think he's a Saint, because I never heard him say a curse word, and he's a humble spiritual man. What a role model for me. This is the last thing on his bucket list, as he likes to say. I'm loving it! He hung in there with me all day today, except for his daily nap from 3-4pm, so he's tough as nails in 100* heat.