I found some discarded 50mm and 110mm PVC pipes, added a few fittings and build a new feeder. It holds more peanuts and trash, is more weatherproof, and you can get all the materials in one trip to the hardware store for about 25 bucks. The frisbee trash tray is at 74cm (and is adjustable) so you can put a table next to it and set the frisbee part on the table to give the birds more space to approach the feeder. I'm also considering mounting perches since I would prefer to have it as an all-in-one thing, but a surface is better for training the birds. The little arm sticking out is for mounting a camera. The whole thing is about 110cm tall.

For reference, here are the first two prototypes.

Protoype #1 - Jars and discarded wood panels

Prototype #2 - jars, wine gift box and discarded end table

I hope to have this one operational in a couple of weeks. I'm still rebuilding the circuit one a solderable protoboard.