Is it time the neuter my cat?

[Joeyjoejoe]

One if my kittens (Azrael) has recently "discovered" himself, but he's only 4 months in age.

I've read that neutering can be done much younger than 4 months. But that's not my question. Should I neuter now or can I still wait until he's 6 months (which was the initial plan)?

I just don't want him to develop bad habits, like spraying.