Actually I think those are almost perfect!
If I could make a suggestion? Shorten the cannons in the front, move them outward more and add a “bulb” to the base of each so they take on a turret style flavor. Also take the back and stretch it out side to side or preferably make it more of a globe/bulb type flavor. Perfect! Now you said corvette model right? Ok assuming one ship model for every two ship sizes make seven more ship models; one smaller and six larger. Then you can take a break before I start cracking the whip to have you work on the carriers, bases, XO mounted missiles, small craft, and freighters! Then I will have a ship set for my mod! Interested in a job?