I ended up buying a couple 1/8x1/4 hose fittings because i broke a couple over tightening(by hand...). They are expencive, was about $5 a fitting, but none of those ones leak, probably because they are metal and just tapped a new hole into the plastic.
I picked them up at fastenal, there's cheaper places around though, it's a 1/8 NPT with a 1/4" pressfit hose fitting. They worked, but a pain to find.
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