I have the howitzer bolt and i have to rant a little bit, theres one problem i found with this awsome bolt it does everything its supposed to but BeOranged forgets to mention that if u have a high ROF with this bolt that it will break your paintballs like no tomorrow,reason being is because the internal o ring give a much tighter seal on the powertube and slows the movement of it even when oiled now on a side note the packagein does say to sand down the powertube a wee bit but im a little scaredd.... anyone else have this issue or found a safe way to do it?