nice ship. it looks very bulky indeed. I also like the color scheme and the use of vertical windows in the front.

Excelent hangar.

Suggestion: change rear hangar doors to air tight doors. They will fit perfectly there and there wan't be a hole in room below.
Right and left hangar doors unfortunately are of incompatible size, so simply changing door type won't be possible. But it should be possible to increase door a bit at expense of piston removal, zus fitting airtight doors.