I picked up a Umarex Notos the other day and have been very impressed so far for what it is. The numbers on the chronograph are straight out of the box. I haven't fine tuned anything yet. It's shooting very nice groups with the factory barrel. I was getting easily under a dime at 50 yds and under a quarter at 75 yds. And I am excited about all the aftermarket options to bump the performance up on these. Although I may have to order another one to modify because I hate to tear this one apart as good as it is shooting. I will keep you guys posted on updates and modifications that we try.