Bird Watching: Can grackles use this suet log feeder?, 1 by Lady_Eagle

Lady_Eagle wrote:
I finally managed to thwart the grackles by buying a Heritage Farms squirrel-proof (and pest bird proof) seed feeder. Now I'd like to add a suet feeder to my feeding station, and I have my eye on this log feeder.

It has bevelled "perches" and it looks like only clinging birds will be able to successfully use it. Does anyone have this feeder, or know if grackles will be able to raid it? Thanks so much in advance!