Entering rocket details into RockSim is not my favorite task. Fortunately for me, I almost finished creating the Thor in RockSim - that means that I'll be able to start running simulations soon.
As for construction: Greg M provided the drill press and drilled the holes in the aft centering ring last night for the motor retainer. Joe at HobbyTown helped me find another forward centering ring since one of the rings provided with the kit was consumed by the motor retainer. I expect to set all the centering rings today and hope to do some glassing with Warren on the airframe tomorrow.