In your list you said I need 1X proto light alloy. But Inara is not saying that. It says I have all but the chemical processors, distilleries and manipulators. No biggie but I thought I would point it out.
It seems my eyes need checking. I read the materials for the experimental effect from the line below the one I intended (ie, stripped down instead of mass manager). The materials are the same except for the proto alloy, which should be exchanged for an eccentric hyperspace trajectory. Makes sense, light alloys are good for building light stuff, hyperspace data for helping the fsd perform better.
I probably read the first two mats from the list and then looked for the third in the same list. Sorry about that.
Edit: This also goes to explain how you ended up needing an extra eccentric hyperspace trajectory.