To test when pie is done, you would gently tap the side of the pie and if it wiggles like jello your pie is ready. This probably sounds funny but it is the best way to test your pie. If you overbake you pie it will crack on the top and sink. On a personal note, my preference would to pre-bake the crust. If doing so, place a pie pan on top of the crust and invert.
Meaning bake the crust upside down.
Be sure to place a weight on top. By baking the crust upside down the gravity will assit in preventing shrinkage. Also, I usually bake the filling alone in a pie tin. This way you would have a fully baked crust.