[Newbie] Help assembling the model

[lifesmellow]

I too did this following tutorials and Printer this Snap together case.New Case Layout.jpgI created both parts and using Fusion 360 these part are created in the same layout though they are separate from one another.I can use one model to help me shape the other model. thereby allowing me to size and correctly postilion parts.I designed my Case from known specs like per-positioned standoffs and size of circuit PCB.Then I searched many tutorials to learn how to accomplish each and every single step of the process until completion.Blue Case.jpgI should have added the Fan Screw Holes, As you can see on this case I drilled them incorrectly.

Thank you Robert for sharing your work. I was hoping that there may be a quick fix for my model, but guess I should start fresh with tutorials that you followed.