DIY Bator looking for ideas for a turner motor

[Flawedatdesign]

Have the bator building part down Looking to build a Larger Size bator but need some Ideas on what to use for a turner motor. Any thoughts will help.

 

[loveourbirds]

this is a linear actuator, it moves fairly slow and can move 250 lbs. drawbacks: its 12 volt so you will need a timer supply.
http://www.surpluscenter.com/Electr.../1-5-STROKE-250-LB-12-VDC-LINEAR-ACTUATOR.axd

this is a timer circuit i designed to work with it: