I have a 3/4 ub acoustic bass. I have only been playing it for a couple of months. My main instrument is an Aria Upright Electric. Anyway, I have encountered all the problems that can show up, especially if you don't know what you are doing, like me when it comes to the mechanical part of keeping the bass in shape so that I can get the best from it. I tried changing strings, and I tried to do it by changing the strings one at a time. You guessed it, the bridge fell and it sounded like a drive by shooting, except it was only one shot. I thought the bass had exploded. I took the bass to a luthier and he fixed it, but told me to keep an eye on the bridge especially when I am tuning. He said the bridge will tend to lean upwards when tuning. He told me to take a rubber tipped hammer and tap the bridge if it needed it. My question is: Is the bridge supposed to be exactly perpendicular to the front face of the bass? The condition of it now is that the tip of the bridge is kinda pointing upward, and I am worried. I don't think my heart can stand another explosion like the first time. Also, what is the best method of getting the bridge to point straight out if it is supposed to?