4 ingots to make the CAD assembly
4 ingots to make the core
2 ingots to make a socket
2 ingots to make a battery (one gold)
Sub total is 12
All useless by about the midpoint of the tutorial, mod offers no method to recover them or reuse components.
By the time you figure this out you've made at least two bullets and a few Psimetal ingots, easily bringing the total to 18 and making me question why I really really need to blow up 5 blocks with a shiny gun.
That's not alot...and it's worth it.