I started with this design https://makerworld.com/en/models/929602-uh-1h-huey?from=search#profileId-893300
The GX files are for a FlashForge Adventurer 5M, I used PLA Carbon black for appearance.
There is a Sketchup File, FlashPrint files (fpp) and STL files.
I print the cabin with supports, the tail with supports and the tail rotor blade with supports. The Cabin, Tail and then everything else (two blades, tail rotor, platform, post, connector) for a total of 3 prints.

Printing the cabin with the nose in the air really works well, the tail is also printed with the cut side down. This ensures the connection between the two pieces is near seamless.

I super glued the tail to the cabin with the connector, the tail rotor blade to the tail, then glued the post to the cabin, the post to the platform, and then the rotor blades.

Sometimes it takes a little force and twisting to get the post into the cabin.

I had difficulty printing the back "mount" for back rotor blade. The GX file is a real slow print that helped a lot. The issue was the blade mount would sometimes snap during a print. I never 100% figured it out, I tried various supports, etc. Other than that its a real solid print. I have printed over a dozen.

Here are the changes from the original design:
increased the size by 25%
made the post bigger
combined skids with cabin
combined rotor mount with cabin
combined rear horizontal stabilizer to the tail
shortened the connector piece for easier assembly