Design plug and play structure

Hello I would like some 3D Solidworks (Latest version) drawings done on the attached files. Please note that some of the dimensions are not important (i.e. variable), and some are marked exact, which means another part (i.e. bearing) will fit into that part. The whole structure will be printed on a high resolution 3D printer. The structure consists of three parts, each part being able to screw into any of the other parts. Part No 1 is purely a fitting for the whole structure onto a specific stainless steel pipe (it just slides over the pipe). The other side of Part No 1 has a screw thread. It must be hollow (some dimensions are given for the wall thickness, but this can be changed for strength). Part No 2 is mainly a shaft, with two landings. One end must be threaded (inside) so that it will fit onto Part No 1. The other end must have the same outside as Part No 1, thread so that any other part can screw onto this end (there is a diameter limitation on this last part due to a bearing that needs to fit onto the small landing). Part No 3 is a normal radiation shield (circular) for some instrumentation. A photo of the idea is attached. The bottom end must be able to screw onto Part No 1, and/or the top of Part No 2. The top end must have the same outside thread as Part No 1 (so I can screw Part No 2 onto it if I so wish). Additionally, it has a cylindrical part that is larger in diameter, with a small plate fitting inside - it is best to refer to the last page for an explanation. Please ask questions if unclear.