Hi. I just purchased a new Stoeger xm1 ranger. I have a couple of questions if someone could answer them , I'd appreciate it. Firstly,ion most pcp air rifies you turn the hammer spring to the right to increase velocity. It doesn't say in the manual and I wanted to be sure. Next, there's a round tube that has a small hole on each side of it which the manual doesn't even mention. What is the purpose of that and lastly should you leave the regulator set at the stock settings because I've heard a lot of ppl doing that with good results and you have to degass and disassemble the air tube to adjust each time. I haven't had the chance to shoot this rifle yet because of the windy and cold weather but, I was just trying to find out some information about it first. Thanks Robert.