More upgradable weapons?

Now that the Soldier weapons such as the Hellspinner have proven to be rather popular, I'd like to see more weapons given the same treatment.

For instance, the Gamma Ejector and the Customized Desert Reet found in the Biomare dungeon - also the various low-power weapons found in the Steps of Madness. An upgraded Brainchopper could be a weapon to be reckoned with.