All parts obtained from disassembling weigh 0 (zero). Optional: remove the weight of more crafting categories (tools, repair kits, parts, and upgrades).
I've been trying to get into Anomaly's crafting system, but I don't like the massive inventory management and the notekeeping you'd need, if you wanted to use stashes. This mod lends a hand in that direction.
The main add-on simply makes all parts you gain from disassembling items (and those found lying around) weigh 0 (zero).
There also is an archive called "zero weight crafting". This is a more radical add-on that removes weight for tools, repair kits, parts, and upgrades. You don't have to install all of "zero weight crafting". Before you install, open the archive, then gamedata\configs\items\items and delete the files of the sort of items whose weight you don't want to change. Example: you don't want to change tool weight, then delete items_tools.ltx from the archive before you install the mod.
The DLTX versions requires Moddb.com
Let me know about problems. The only thing I did was substituting all values in inv_weight with inv_weight = 0. I should also be able to make versions for other add-ons without much trouble.