Harder Crossword #1

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Across
  1. 6. A type of triangle (#3)
  2. 7. A type of triangle (#1)
  3. 8. Lead Alternative
  4. 9. A type of triangle(#4)
  5. 11. Sketchy establishment
  6. 12. PG version of suicide/murder
  7. 13. Semi-controversial version of reddit
  8. 14. VERY, VERY, Very old bipedal
Down
  1. 1. Symbol/Signature to claim ownership of a visual piece
  2. 2. A type of triangle (#2)
  3. 3. Input -(Something)-> Output
  4. 4. Largest tier of collection of universe (>Multiverse)
  5. 5. German Mayor
  6. 10. A very specific group of numbers
  7. 13. Answer to life, universe, and everything