I just finished mine this weekend (with help from my niece!)
I'll add that in addition to ordering the 12" globe and globe fitter, go ahead and order the ears too. I thought I had seen ears at my local store, but when I went to pick them up after my order arrived - I discovered they were glass and not acrylic as my 'head' was.
Also, I didn't know what a fitter (or coupler) looked like. This fit inside the globe fitter and slipped ontop of the post. Seeing the picture in CDNcruisers directions (and with my DH help!) helped there.
Once it all came together, it wasn't hard to do.