Molecular Level Fallout 4 no faction alignment

I noticed the quest gave me the option to seek aid from a faction. Which seems to indicate you can do it yourself without seeking help. Turns out it is not intuitive to do it yourself. Basically you NEED to talk to a faction first and then do a few steps and it resets the quest progress.

1.  After getting the plans from Virgil go to Desdemona 
2. She tells you to talk to Tinker Tom
3. Talk to him and listen to him talk about what you need 
4. After he is finished talking, trade with him and get the schematics back 
5. The quest will then reset and the Relay will appear in your workshop menu

Some other forums have posted the bonus of seeking help is they describe how to do everything.

Solution was originally mentioned on this page, unfortunately it only has 1 upvote :( Someone also mentions that it is not possible to do it with the minute men because he isn't a store normally so the schematics do not appear (haven't confirmed that though)