For the 2nd time my Samson 2>1 Caliber broke at the front header pipe . Apparently the Dynas have too much vibration when you factor it with the heavy rear bracket and the extra length of the pipes. Samson replaced it the first time and offered to replace it again but we discussed it and decided it would only happen again. So they are replacing it with their new Big Guns-3 Cannon model, long and flush ending as opposed to their Ripsaws and Street Sweeper designs. I really like the Calibers but they just aren't made for Dynas. Does anyone have experience with the Big Guns-3?