Squirrel-proof?

So much for our squirrel-proof feeder. It was one of those spring-loaded models that would close down over its hoppers if too much weight sat on one of the perches. It never completely deterred them—our backyard squirrels had figured out a way to grip the deck railing with their back feet so that their complete body weight was not resting on the perches.  In this way, they could nibble a bit.  More often they scooped seed out with their noses and then ran down the steps to eat what had spilled onto the patio below.
Yesterday, however, more than one of them must have tried to sit on the feeder. I looked out the kitchen window to see that the feeder was hanging precariously from the end of the very stretched out spring mechanism.  I have repaired it a couple of times now, but this time the spring itself was completely stretched.  I guess I’m in the market for a new feeder. 
  
I do like squirrels, but they have their own feeder, and I really would like to find one that was squirrel-proof.  Our nature shop carries the kind that spin when something heavy sits on them.  But I don’t want to send the squirrels flying to their deaths. What to do?  If any of you have had success with a particular feeder in this situation, I’d love to read your suggestions.