So building a Garage ship isn’t in the tutorial and when I learned how to do it, there weren’t a lot of guides explaining things.
So start a creative game and whatever 90% of the ship is made of start with that first. So if you want it to have mostly armored concrete start with a base and design that. Combat steel? Well either BA/CV (Probably CV for the weapons/thrusters) etc.
So you have the design finished but you need to add those HV drills to make your new Raider MK5 right? But it is also still a CV? Well first open ` and find it’s ID. Should be something like CV0003. Next spawn in a HV starter block and find it’s ID should be something like HV0004. Save and exit the game going back to the menu. Open your game file and find the game you where in. Go into saves and CUT CV0003 file, go into the HV0004 file delete the file FIRST then paste the CV0003 file into it. Now reload your game. BOOM it is now a HV ready to have HV parts added. Also on a side note Add the Alien core LAST before you submit the design. If anyone has any other questions feel free to ask or PM me on Discord.