weapon motor---need help

Hi, all

I need some help with a diagram and parts on the best way to wire up a drill motor that turns a metal threaded rod which in turn lifts my weapon arm (lifter) I thought of using a speed controller for this but then I remember someone saying use a relay switch to turn power to the motor on and off?...can any one advise which would be the best method and if the relay method then can provide a link as to where to get them. I have never wired up any replays before so don€™t have a clue€¦€¦

I€™ve found this relay and thought it would be easy to control via the RX, but would this do?

http://www.dimensionengineering.com/...eSwitchbig.jpg
my system will 18v roughly on lipos

any help would be great

Best version would probably be a speed controller, but that might be more expensive. I think most people use battleswitches to activate bigger relays, but i'm not exactly sure how much current a lifter motor would draw. If a bigger relay is needed, I will be using something similar to this for my spinner using the battleswitch-relay-motor setup.

http://www.ebay.co.uk/itm/CAR-BIKE-24V- ... 20c02bf7d3

Thanks for the link. Ill have a look at them. Would the rely be able to reverse the current to reverse the current? Would the speed controller perform better / last longer than a relay for the lifter weapon. Ie. Not burn out.