Two small pulse lasers won't even make your opponent angry
- ditch them.
Yes, get rid of the E rated stuff and replace with D. And definitely get a bigger fuel scoop. Also, you don't need that additional fuel tank - that one gives you just 10% (ok, a bit more) of your main tank. But you might scale down the shields - the DBX as explorer does fine with a 3D or 3C shield, the size 4 shields are good if you use it as a fighter.
With a 4A fuel scoop (expensive) and 3C shields, 5A FSD and D rate everything else, you can run a 2A power plant and save some mass.
When Coriolis works again (works for me right now, but I've read other people having problems, too), here would be a
link.