According to Brickset there are two sets with the same number. There's also a 610-1 Vintage Car. The helicopter is called 610-2.
How should they be numbered to be OMR compliant?
Interesting, and well spotted with the image. But the parts list on toysperiod doesn't match your build either. I wonder if they just guessed their parts list or got their info from somewhere else...
The attached file should now be correct from OMR file naming scheme.
Additionally I have changed the distance to 5 studs like you said. This looks good to me. I had also taken some inventory, but I think they are wrong (or contain more parts that we need to build the model).
Edit: Shifted the main rotor
Edit: Shifted the main rotor again by 0.5 LDU
Edit: Now with patterned part.
Mmm. What's interesting is that I've now found the same parts list on 3 sites, where the tail plates are 2x2, 2x3, 2x4, 2x4, 2x6 and matching the box-advertised 35 parts, but the only way I can see to build it that way is with the 6 studs to the tail. Either the box image is misleading, or these sites have all wrongly copied each other.
I like your summarize. We know that TLC sometime make wrong pictures on the boxes. But we do not know that in this case.
So far I am going with the picture and not with the inventory.
The inventory can still be correct!
Not sure we'll ever find out if its 5 or 6 unless someone owns one of these.
But, you're probably going to hate me for this, but the "repaired" mpd still has the main rotors at the wrong height. I said it was 8 ldu out, but in fact it is 4 ldu out. The square at the bottom of the propblade should be riding above the 2 red studs.
Yes, I'm happier without the 0.5, because with it then technically the top of the pin is left under compression from the propblade, and you can clearly see that from a seamless ldview cutaway.