David,

There aren't really any 'patterns'.

You pick the type of and material for the tails. the variations are endless, and most things will work just fine.

For the rest of it, it's what you construct the bodies out of, and how you color them.

Depending on your skill with paint, sprayers, markers, masking mateials, coverings, and such, you can do whatever you want with them.

No 'wrong' way to do this.

Good Luck!

Buddy