Walters N Scale Roundhouse Questions

I am in the process of doing some track planning, and I have a question for any of you who have used the Walthers N scale turntable and Roundhouse setup. I am trying to accuratly draft the setup on some plans, but I need some information, and the walthers website seems lacking.

What is the radius distance from the center of the turn table to the front wall of the round house?

What is the radius distance from the center of the turntable to the rear wall of the round house.

How many degrees are there between engine stalls as measured from the center of the turntable.

Thanks,
C. Alan