Hey guys, I bought my first airsoft gun, a plastic dboys m4 that shot about 250 fps and, and since then, i have owned a few more guns including a d-boys Scar-l, a JG T3 RAS, a DE Krinkov ak47(it broke after like a month piece of poo) and the list goes on. I have never really teched a gun, well actually i have fixed some problems with the hop-up, fixed a motor, and other things along those lines, but the gearbox is something that i have always hesitated to open up, because i know that if i mess one thing up, i will have a lot of trouble putting it back together. How should i get started? should i get a cr@ppy gun to use as a back up gun, and that way i wont be too guilty if i mess up, or should i just start teching my good guns, and take apart small parts at a time, and slowly learn the anatomy of a gearbox? How dis you guys become experineced with them? Is there anything that I you reccomend i do to get more experience? Would building a gun from the ground up be a good start, or dismantling a gun completely? I am pretty good with building and fixing things, as i have worked on anything from car engines, to robotics kits. My aptitude towards teching a gun is not the problem, i just dont know where to start. I want to learn how to reshim gears, eventually put new ones in, and after that, the list goes on. Any suggestions from someone who was once in the same boat as me?