Mine just reached the Juvie stage. They grow relatively slow, expect a molt every couple of months to a year. Mine's very skittish... but I leave him alone most of the time. He only kicks hairs if you poke at him. There was this one time where i had to prod him out of his burrow in his old enclosure to put him in his new one. For some reason my hand had to twitch at a REALLY bad moment, and his burrow caved on him, making him flick hairs EVERYWHERE. He had a pretty nice bald spot for a month or two until he molted. They're beautiful overall... they're my favorite new world species. Not recommended for handling in my opinion, unless you like T's with bald bums.
Goodluck!
Goodluck!