Mine was deadly with R-10 Heavies last winter, Barry, that's a good choice for 10M work. Tries several match pellets, those were the best, Daisy Avanti's were the worst. I was surprised to see the one piece stock on yours, I thought you'd ordered a target model. Mine is almost the same as Gene's, but my air tank has a quick fill instead of a gauge. Might order a second tank from Champions Choice, I kind of like having a gauge, and at 15 fpe, my shot count isn't too great, plus it drops like a rock if I try to push it.
BTW, if you get frustrated with the Avanti rear diopter, check out the Air Force diopter. All the precision of the high end match sights at well under half the price. I still need to order the front sight, but the rear is tucked away, waiting for the winter's snow and cold temps. Congrats!
Dave