You can get a manual by sending an email to
[email protected] with your name and address, and we can mail you a copy of the 783 manual. We also have an aircraft programming guide that we can email to you as well. Parts are extremely limited for the unlimited 8, and if there is anything wrong with it, it is likely that it would be un-repairable. The batteries would likely need to be replaced. There may also be some brittle wires that could potentially snap at the connections. That is a difficult call. You can send it in and we can check it out, just request an estimate in a letter if you wish to do so.