Glenn,
Like you have have 100's of hours using CorelDraw and wanted an easy way to make 3-D models.
I try and look at CorelCAD, Blender, SketchUp etc... Out of all of them I find that SketchUp was the easy to use. I did try Blender for a short period but found the learning curve much steeper than SketchUp. However, Blender offers huge advantages over SketchUp in photorealistic rendering, faster modelling, realistic materials and better animation toolset.
I believe you can download a free version of SketchUp or you can download SketchUp Pro for 30 days.
If you want, I should be able to make a model for you and I can upload a 3-D printer file for you once the Trimble logon is working again.