hahaha, there are 523 blocks in this one, and I have four of them to do.
Someone cut all the block for me (over 2000 in total) in thickness ranging from 1mm to something like 240mm.
It took them two days to cut and label then all.
Then it took me about 4 hours to spread them out in order on trestle tables.
About 6 hours to assemble and glue this one !!!!!

The blocks are just stuck down with PVA glue, on the bottom and all sides, glued to the block next door to it as well.
I have just checked them this morning, they are super solid, and quite heavy.
Have attached a picture of over 2000 blocks laid out ready.
And yeah, in the control those are curved bass traps that you can see in the distance.
VIc
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