I would like to second(or third?) using the JG bar-10 lever in the TM. I compared the arms side by side, and the JG "prongs" are indeed about 1mm to 1 1/2mm longer. With the current spring I have in there(500-550 fps), I could not overhop a .36. I swapped the arm and now can overhop with the arm 1/3-1/2 on. No loss of accuracy what so ever.