If you turn off a few of the modules you don't need when you're not using them (AFMU, buggy hanger), you can downgrade the power plant to a 3A. Will give you a little more jump range and a slightly lower running temperature and even save you a little money.Most will probably say to ditch the weapons and thus save weight and they are probably correct but I took a fully armed Asp explorer all the way to Jaques and then to Sag a*, never needed the weapons but felt better having them. You could even put a smaller shield generator in, (I run a 3A on my Asp) which would give you more range and allow an even smaller power plant.The above will give you a couple of extra light years, just depends on how you feel about a less well defended ship.If you've really got 20 billion in the bank, you might as well upgrade the fuel scoop to 6A and the AFMU to 3A.DogsBody.