So I was asked to do a guide on how exactly the bolt mod is done on the AUG. (Used to replace that POS “motor plate”). I will be including pictures that will pretty much explain it, but I will also be talking my way through the procedure. Anyways let’s get started. Does your “motor plate” look like this? Does your entire gearbox move when you pull the trigger? If you answered yes to either of these questions it’s time for you to begin the journey to a more reliable solution. First things first, you will need, a bolt, a nut, (I used stuff I had laying around, note I didn’t use a nut…) and a drill. Once you get everything together you’re going to want to remove the “motor plate”. Once done with that mark where the gearbox sits when all the way forward in the body. This is where you will be drilling through. Once you’re done with that start you’re drilling (remove the gearbox…), you want it to be as straight as possible and if you’re not quite straight it is better to be slanted towards the gearbox. Once done it should look like this. Now you will notice in my pictures that I have 3 more holes surrounding my larger hole. That is because I used a wood screw (?). It has three prongs on it. Here is a picture of what I used. Works really well because the threads are hidden in the body. This keeps the gun looking sleek…Much better than a nut. However if you don’t have any wood screws lying around a nut will work. In the picture you will notice one is longer than the other. That is because I had to take a hack saw to it to make sure it wasn’t to long. To do this you will simply screw it in making sure it isn’t to tight and mark where it is a little more than flush. Take it out and cut it off. (Mine needed grounding on the ends after cutting to insure it would easily go into the “cap”) Should look like this by now. You’re almost done! Now all you have to do is insure that the gearbox is seated all the way forward. To do that put the gearbox back in the gun. Press it all the way forward and insure that the bolt you have installed applies enough pressure to keep it there. (It doesn’t have to be “exact” but you want it to be pretty close otherwise you will have air leaks) If it’s not applying the pressure needed don’t freak out! There is an easy fix. All you have to do is insert the bolt halfway, (not into the “cap”/nut) and wrap it with electrical tape until its snug. This will push the gearbox forward that extra little bit. (I don't have a picture of this step because I didn't have to do it...) Hope this helped some of you wondering what I am referring to when I say the bolt mod. -ThompsonFTW Thanks to 1Whitekid and Tackett.