https://www.fightingrobots.co.uk/threads/11789-pneumatics-for-featherweight/page13

https://www.fightingrobots.co.uk/threads/10884-liftoff-(fw)-build-diary/page22

https://www.fightingrobots.co.uk/attachment.php?attachmentid=6323&d=1478292081

https://www.fightingrobots.co.uk/threads/6987-pneumatic-flipper-systems/page3

http://www.robowars.org/forum/album_pic.php?pic_id=1422

robowars.org/forum/album_pic.php?pic_id=1420

http://www.robowars.org/forum/album_pic.php?pic_id=1421