Talk:Construction/@comment-114.179.18.37-20140307062942/@comment-24348385-20140307065022

Two links that may help you:

http://kancolle.wikia.com/wiki/Development (main item craft page)

http://kancolle.wikia.com/wiki/List_of_development_recipes_by_item (list of recipes by item)

If, by finding equipments in sorties/expeditions, you mean looking for equipments that come on ships you obtain as drops from sorties, well that is certainly the cheapest way to collect the common ones (like the 20.3 cm cannon on CA drops, 12.7 cm cannon on DD drops, or the default planes on all light carrier drops). If you want to look for rarer ones (radars, type A ko-hyoteki, 10 cm HA gun, for instance), then grinding certain ships may help rather than trying to craft them. Upon remodelling, some ships yield the equipments I just mentioned.

You can't really get items from expeditions, except those expedition quests like the one that gives you a unique dive bomber for completing expedition 30 twice (you need 4 submarines to do that).