.Well, that's a lot of questions to answer so I will take them in order:
1) Jimbibbly - the name of the book is " Leksykon Zamkow W Polsce" and yes it is in Polish. Good luck finding a copy as the only way I was able to get ahold of it was through an inter-library loan - hence the reason I spent two weeks scanning it and converting it to pdf files.
2) Hammers - before I started building this monstrosity I did a bunch of casting with several different products but it is mostly "Merlin's Magic" (the grey and tan) and hydrostone (white). The Merlin's is quite expensive when you factor in the shipping costs so I usually get the hydrostone - which I can get somewhat locally as I have a friend who lives near the supply house and grabs it for me when he comes to town. As far as the build itself goes I'm pretty much trying to do it as it appears today - although I have thought about taking my little black-powder cannon to it after its finished

(not hardly). Oh and the curved blocks are actually 9"dia blocks from the 8" tower mold. The outer wall as you will see when I post the next batch of pictures is going to be small 1" blocks filed to shape to create the curvature.
3) Artshiraz - Yes its going to weigh a ton but the walls will be foam filled. When mortaring/pointing I use either carpenters wood glue or a mixture of talcum powder and future floor wax - which also works a treat.
Hope that answers the questions. If I forgot anything I will try to remember it when next I post. Thanks guys