[Wardad]

Yes, only 50% of all resource costs above the current cost. I sometimes do a refit series. There are some service charges added to the refit, so I find it easier to only do 45% of the cost. Thats what they make hand calulators for.

I generally refit to save a build turn or 2, or to benifit from a local training facility.

In one game, I'm upgrading many minning facilities and adding bonus facilities. So the refit series will keep me in ships while my space yards are busy expanding my resource base.