Any when you say two hour blocks does that mean you saved x number of frames at a time?
yep - but not any specific number, I'd turn on a few layers, render the screen, and see how long it took to render, I then usually multiply the seconds by 1.5, to give myself some leeway and allow for delays in AL, then I'd make a guess as to how many frames to render, I usually try to aim for some natural break, like if the camera moves position, or a certain batch of parts is added. - nothing scientific - its all guesswork.
Did you then use anilabs montague to build the animation?
No - I normally use a program that is no longer in production called Serif MoviePlus, but for this I gave Corel Video studio a try because it had a good price discount at the time. it worked ok but did crash two or three of times and its not as friendly in my view as MoviePlus, though that may be simply because I'm well used to MP.
I haven't used montage centre for very long time, as it used to crash easily for me, so I gave up on it in favour of a dedicated program, no idea if its better now.
What was the total animation build time approx?
Don't know exactly but I'd guess in total around 40 hours, I'd often set it going just before I went shopping or went into my garage (workshop), if I was expecting a longer AL session I'd start it then go to bed, things don't always go to plan, sometimes I've missed a part or made it move too fast or screws are turning the wrong way, so I'd alter things and try again.