I have recently opened up my gearbox for the first time, it exploded lol. But the explosion is just a side note, don't worry I gathered all the pieces. Now I'm trying to put it back together, but I can't get the trigger to stay in. I've been going at this for a good hour now and whenever I get the trigger into place it pops off because of the spring. Is there any way to get it to stay (I know there is, I just fail), and how am I certain that I have put it in the right place (it looks the way it does in the videos I've watched, but looks can be deciding)?