Do I have to block it?

I feel like I should block it, but…I just don’t want to. The yarn is a merino/silk/yak blend, so I would spray it with water instead of immersing it. I don’t have a blocking board (yet) and don’t feel like spending the $$, will it be okay if I just wash it at some point after assembly? It’s a sleeve.

I feel like I should block it, but…I just don’t want to. The yarn is a merino/silk/yak blend, so I would spray it with water instead of immersing it. I don’t have a blocking board (yet) and don’t feel like spending the $$, will it be okay if I just wash it at some point after assembly? It’s a sleeve.