Fortunately I missed those. Why dont you go to
www.brantly.com Seems like a start.. I searched the web and there is a ton of info out there. Best Search engine to use is to go to
www.copernic.com and download Copernic 2000. Then ask "Brantly Helicopters". That should help a bit.
They have been around a long time, look like **** , but does whats needed.