any cross talk issues? If so, stuff old cotton t-shirts in the tubes.
As for fit, i recall with my dm5, I loosened everything just enough that I could play it and it wouldn't move, but if I pulled hard, I could move the tom or snare. Gave me the flexibility to adjust on the fly. then, once I kinda had it like I wanted, I tightened everything up.
Look at pics of other's kits. when I set up my DM10, I never liked where the snare was, but was getting used to it. then I saw pic of mazzith's kit, and realized my snare needed to move. when I made that change, it felt a lot better. It's all about trial and error.
Have fun!