I had a 1000 in the 80's and it was thin neck but very well made. I've never heard of the headstock fall of one.Recently i was thinking of getting a second hand one again, they can be had for 500- 750 so a bit of haggling,
a trip to the luthier, and new pup's perhaps for 1k(my limit).
While looking a few people reckoned the woods and' rapid construction ' methods mean they're not the same quality as the originals but i've never come accross a duff yamaha product. period .