Here is where you can get scale detail parts. I used 1/4 scale. I made all of the guns out of 1/4" carbon tube old pushrod material I had lying around. The cowl guns I used the carbon tube and a nylon bushing. drilled the bushing so the tube would go in then using my shop sander to get the angled profile.
https://www.iflytailies.com/store/in...rcraft/fw-190/