You may also want to consider making it a fun game for the dog to play with you. Only do it for a few minutes. Gut the dog really excited. Then take it away and put it up. Do this over and over daily until the dog can't wait to get it. If it play too much with it it can get satiated. But if you take it away when the dog really wants it you can build the drive for it. The big key it is make it fun and exciting. In very little time the dog will desire it whether you are there are not. Of course it will want you to play with him The dog will ring it to you to encourage you to play...

Then you can connect it to the end of the spring pole. Teach him a command to grab it and to release it.