Having done some more daily resets using my researcher + rec the cost isn't as bad as I initially thought. The 8,000nc x3 and the unressed for completing the chain mostly ofset the costs of materials. Also the extra lube you end up with is a nice touch.

I did another construction + rec and found that the cst blueprint required a type of weapon part 10 (not the usual ones but the ones with the longer name). This greatly increased the time to complete from research missions. Perhaps a change to only use store available parts?