Lazer_one don't you think that 30 mm station has too small ... what the hell is that word ... base shield ? Gun crew has no place for moving and operate battery.
You are definetely right! Thank you!
I changed the 20 into 30 mm without taking care of the bases.
I completed the main bridge and I'll clean up the drawing before to proceed.
BTW it is an interesting "drawing challenge" because due to the size the overall view gives only the main proportion and using more detailed views is missed the overall ship...