User contributions
- 00:20, 8 August 2015 (diff | hist) . . (+112) . . Talk:1561: Water Phase Diagram
- 07:13, 16 January 2015 (diff | hist) . . (+77) . . Talk:1474: Screws
- 21:04, 14 December 2014 (diff | hist) . . (+92) . . 385: How it Works (→Explanation)
- 06:24, 14 December 2014 (diff | hist) . . (+141) . . 1284: Improved Keyboard (→Explanation)