Jonzer, its all in the way you do it, most the time when I go dig, I can stand it for 4-6 hours is all. I don't try to kill it though, I set a mild pace, dig 3-4 5 gal buckets of dirt searching with my eyes, then drag (don't lift) them 10 ft away to sift em and find what all my eyes missed. I don't do much lifting, and only fill my buckets to about 80% full to not load up the weight. I then left my sift lay on the far side of it on the pile and just lift my end enough to shake and wiggle it side to side, or rock it up and down side to side. I used to hold the sift and man that is back breaking work. I've found that using less effort and more brain power has been a lot better for me. I also do not use a shovel very much (that is real back breaking work). I only use hand shovels but mostly a little hand held 3 fingered garden tool. I get me a hole where I can drop my bucket into and scratch dirt up and move it with my gloved hand into the bucket. At that pace, I can go for hours with only a short drink break. It is slower than the other way, but after figuring the endurance and safety of the points intact, I like my way a lot more.
maybe Ill make a video of my way tomorrow when I go. I could go back to that field, but I got a feeling I'm gonna find some nice ones digging tomorrow.
Tree