Sorry, but I don’t see the point. The yolk star’s lasers can only be nullified with the ICBMs, the mines, the rockets and the barbequer, and one hit is enough.
But i have a edit to your Idea
Only the side canons can be destroyed
making it more difficult
on SSH the 3 middle ones are invincible
and on normal only 2 are invincible
so that it can be challenging
Wouldn’t it be more elegant to just have them knocked out temporarily? Harder the difficulty, more damage to knockout and less stagger time, and vice versa. In my opinion, that would make it more challenging and exciting.