I just got this gun, and after reading the so so reviews on it, i find myself somewhat regretting buying the gun. I did get a great deal for it thoughl, brand new for 179.99. Now, im no gun doc or JG expert so i do have a few questions. With the stock internals, how long will the gun last shooting on semi? Will it prolong the life of the gun? Should i downgrade the spring (which i dont know how to do) to lower the FPS?