evening
im currently piecing the parts together for a flipper system for an ant and having used pneumatics on model boats before i have a little experience however im used to not having a weight limit so could anyone with miniature pneumatics answer these

1) is this a good enough cylinder for an ant or is it overkill:http://www.hobbyking.com/hobbyking/s...r_6xL80mm.html

do people use air or do they make c02 systems using the emergency bike pumps that are on the market like this:
http://www.ebay.co.uk/itm/Planet-Bik...item2eddacd55c

3) is there a micro solonoid or switch block that is very light weight but effective and the only ones i have seen are 3 way switches and i dont wana waste air or weight
thanks muchly