BeckerFly - I have a page on my site devoted to Hinge Points. Only some of it will apply to your situation because the model is already built and covered. But I agree with Foxx. Hinge Points are my hinge of choice too. I've had zero problems with them and they make hinging much simpler and more importantly, precise.

Here's my hinge point page. Hope it helps.

http://www.airfieldmodels.com/hinge_points.htm