I think I agree — that
two engines in the middle might be preferable to my four — visually. I wouldn't want the two fuselages too close to one another though (for visual reasons, again). The four engine cluster was much easier to "kit bash" though.
If someone has a couple X-Wing kits sitting around maybe they can do a twin with just the two engines in the middle. And probably they can make it nicer than I did.
I sort of dislike these small Bandai kits. The smaller scale is kind of a drag (as I am getting older) and while they are cleverly designed and very detailed parts, 1) I like to test-fit parts but their snap-together tolerances make that difficult to un-do (and so I resisted test-fitting and it lead to some mistakes made), and 2) I forget sometimes whether I'm building Bandai or Lego

.
I considered that a second pilot could of course have been flying while the other targeting the Death Star vent. I also considered that perhaps the Twin X-Wing existed before droid co-pilots were a thing — perhaps I could have replaced the droids behind each pilot with a turret-gun. But I didn't want to wander too far off of canon.