Reply from SkatePro: Hi there Laurent,
Thanks heaps for dropping a review! 👍
Glad to hear your son is enjoying his setup too 🙂
Regarding the crooked trucks, that's quite common for brand new boards, as the brushing are new and very stiff.
For more maneuverability for your son, you could just loosen the kingpin and that should be enough!
But, if that's still not enough we could recommend softer brushing here, the Bones 81's https://www.skatepro.uk/388-10198.htm
Best of luck 👍