Quick question, are all of the Esky heli's parts compatible with the Blade?

Helihobby has them all listed together and they all look about the same so I would assume they are compatible, but I just wanted to check.

I'm wondering about the main gear/shaft in particular, the Esky one looks to be better made and it's cheaper, will it work correctly with the blade? (last item on this page - http://www.helihobby.com/html/ESKY5.html )