The title of this section is again ironic, but here is what I propose to make galactic reactors: (only for theoretical purpose, work in progress...)
Make the spices:
Helium-3 (2nd spice): Extract the isotope from abundant Helium as defined above.
Heavy Hydrogen-Tritium (3rd Spice): The simplest way is to recover the valuable substance in the bottom of heavy water reactor pools. But it would be possible to produce lithium-6 (stable) bombardment, it should be noted that according to the data currently available, tritium has a half-life of 12 years (Is this the truth?): $ 30,000 US per gram, I doubt it :)
Translucent Crystal: Should not be a problem, 0.01 $ per gram :)
Make a solvent and a resin: I imagine, because I can not determine it precisely :(
Mix everything and centrifuge to distribute: We need a single layer, it could take many hours ultra-precise centrifugation to get there.
A split crystal could act as an oscillator: the deviation does not have to be huge, but at the right speed.
Make the reaction in the center of the crystal, which must be in the form of a hollow cylinder, to extract the gas.
burn the gas, after purifying it of its imperfections: See later for the best techniques to use.
appreciate the simplicity, and hope for 9.8 m / s² :()