Back in my model building days in '86 or thereabouts, I went to Hobbyville in the mall, and there on the top shelf was a box containing the Yamato. I asked to see it and the retailer got it down from the shelf. He said it was a special order from Japan, but the man had not picked it up yet. It was $145.00 and about 5 feet long and motorized with working turrets and everything. This ship was very detailed and mototized with batteries included (the batteries were the size of small motorcycle batteries.)
I was ready for a challenge, and probably could have done a decent job with detailed and complete instructions. Only thing that stopped me from buying it right then and there was....the instructions were in Japanese, and even then didn't look complete and would have required a lot of intuition and know how. It had about 2000 parts and would have been a monster model to build with detailed instructions.
Whoever built that one would have had to know what they were doing.
Les