Ensure you have a pre-acceptance flight test performed to ensure it actually meets the advertised performance in terms of quoted OGE performance and cruise speed. If it doesn't, don't accept it. I know someone who bought a B2 Squirrel to relace his B1 and was very disappointed when it didn't meet specs. It went back to Eurocopter, but ultimately, it was never fully sorted out and doesn't cruise as fast as his previous, lower powered machine. J