Hey, nice logos, Piraka, thank you.
I think your yellow is a little brighter/bolder than the spec yellow given. The simple clean lines of your crane are very nice; we'd be interested to see that crane in some other configurations. #6 ends up looking a bit like sailboats on a red sea - but the rectangle idea is strong and attractive to us. I don't know if the sailboat impression can be avoided in that sort of design....
Anyway, thanks! This is a fun process.