Im working on a Tamiya CV-6 myself, so Im familiar with its issues. The island of the kit is pre '43, yet the flight deck itself is after Midway '42. So it has too many spots for the 20mm's, too many gun tubs, and shouldnt have the tub support beams on the bow. The gun tub on the bow should have 2 20mms at Midway, but after would be replaced by a 40mm.
For Midway, Enterprise should have (32) 20mm's, (6) .50's, (4) 1.1 quads, and of course the (4) 5/38's.
However, I only know 30 of the 20mm's positions, and not sure where the .50 Cal's are. Red spots are 20mms, yellow .50cals. I marked 2 .50's on the front catwalks (I know there are gun's there, just can figure out which), and marked 2 20mm's at the rear catwalk (they could be .50 cals though). I think theres 4 more guns on the island, all have gun tubs, 2 in the front and 2 in the rear.
guns by
JTninja, on Flickr
This picture above is of the Enterprise returning to Pearl from the battle of Midway (pic dated at July 12th). It has most of the gun tubs are clearly shown, others that were unclear I marked. (updated with correct picture)
Below is a picture of the Tamiya flight deck, which I have corrected if you want to use the kit as a templete. Also remember if you use the tamiya as a templete, the placement of the flight deck rear tubs are wrong for Midway (both should be on the flight deck, instead of just 1 on it and 1 on the catwalk).
gun2 by
JTninja, on Flickr
Im sure Gordon Bjorklund might be able to make sure Ive got everything correct. He's built this ship several times, each excellent and found in the websites gallery.
Edit: Im not sure how different the instructions are between trumpy's 1/350 and 1/700 Hornet, but it might be a better starting spot for a blueprint of the catwalks. Heres page 8 of the 1/700 instructions
The rear is good except part C24, C34 and C35 are correct but should be 50 cals. Above that diagram, tub part E36 should be on the flight deck (on top of piece D39 I beleive, or the box near the crane behind the island), not on piece B5. C26 and C25 on the front catwalks just need tubs at the very front.
"Also we will never see a 1/350 late war Enterprise from Dragon due to a paralyzing fear of success...." - Heavy Melder
Lots of unfinished model ships + attention issues = A busy slipway where nothing gets done!