housing for a juvi carpet?

[Sasha2]

Okay so I have him in a 16 qt tub and he is eating fine and only semi nippy.
I want to go ahead and move him into the 24Lx 18D x 12 cage(its about like a 20 tall on its side. I want him downstairs so I can handle him a bit more often then once a week.
Do you think it will make him more nervous, the cage is side opening and I will black out one side of the sliding glass doors.
I failed miserably with my last jungle, he was a biter from day one and after a couple years he was even worse. Seriously I had use a hook to hold him off when I changed his water dish.I rehomed him to a breeder.

I really really want this guy to tame down before he gets big, cause then I start getting wimpy and dont like being bit.I know there must be a fine line between stressing them out by handling too much and then not handling enough so they dont ever tame down. So all advice is welcome