Helix Wletcher

What used to happen to me was that I used to run out of electric charge. My command pod didn't hold solar panels and while returning to kerbin, I used to run of it and my ship used to start shaking and then become completely uncontrollable. I attached solar panels and batteries and now that never happens. Quite a simple thing, idk if this is your case. Goodluck!

I have used the tool... I forgot what that's called. And it's all the way out. The fuel tanks seem to keep on going halfway inside the decoupler though, I always need to set it up properly. I will retry again soon. Thanks for your reply ☺.

I have reached to a point in the career where I have to head to the mun. I have been having problems building a spacecraft. Now that I have built one, the radial decouplers have stopped working lol. I use liquid fuel boosters, 2 of them, and obviously radial decouplers. I have always make sure that the fuel tanks are attached properly to the decoupler and I still face this problem. I do use struts just so that nothing wobbles. Is this because of that? It would be amazing if anyone knew what I could do. http://imgur.com/a/jI4L9