Bullboss?

I’m picking up a Hatsan Bullboss in . 22 from a member of another forum. I have a Flashpup already that I really enjoy except for the bolt action and its location. Plus’s it is a little too light for me to hold steady off hand. I like the idea of a little more weight and the cocking handle being up by the trigger a lot better. Also the fact that I can carry extra air tubes and easily add a regulator. From you that already have the Boss, is there anything that I should be aware of?