[Chris Fultz]

Pneumatics are usually faster than a motor.

If you need to make some action at the end of an arm or extension, usually a small pneumatic cylinder will be lighter than a motor and gearbox.

With the limitations on the types and number of otors in the kit, sometimes the best option is a pneumatic, so that a motor can be used in another location.

Especially if you just use a charged tank and leave the compressor off, pneumatics do not use much power.

Small pneumatics are great for most shifting transmissions.

Pneumatics are usually the best option for linear motion, because of their speed.

Pneumatics can be controlled for multi-positioning - see several threads on the topic.