I see a ton of edge loops that don't need to be there if you want to reduce the poly count. A lot of your cylinders seem like they could have less edge loops, particularly the guns (it looks like you modeled in a tiny lip in the barrel), those things on top of the hatch. The cockpit's edge loops are uneven - many more…
Thanks for the feedback! The edges creating the lip at the barrel were there to prevent a 90 degree angle, as I've read it's better to bevel a corner than leave it 90 degrees as it will cause smoothing issues in the normal? I'm pretty new to baking high poly geo to low poly, so I'm still learning. Will address the other…