trebuchet rigging?

alright im working on a school project and im making a 3d trebuchet, i have it modeled somewhat and rigged half-assed, any help with ideas for a IK setup for the rigging or anything else useful is greatly appreciated. here’s the blend

http://jhsite.zapto.org/trebuchet.blend

It looks like all the parts of your trebuchet are seperate objects…have you tried parenting them together? You wouldn’t need an armature then. Place the centre of each part where you want the part to hinge (for example, in the middle for a see-saw effect, more to one side to get a door effect etc.), then parent the objects that will move along with the object that you’re swinging. Of course - it does need some work with the IPOs in order to get a smooth effect. But despite it being long-winded it’ll be easier to animate.