I have spin tech plates on the Primos Vault feeders and they work awesome. I have some that have been going strong for 3 to 4 years. I also use eliminator plates on my 12 volt (1/4" shaft) feeders. Make sure there are no places on the feeder motor mount were corn can hang up when spun (coon sees, coon will tear up everything in its path to get corn). Also, make sure feeder motor is high enough off the ground so big boars can't reach on hind legs. Last thing is to set some dog proof traps with corn and after a month or so, you will be coon free. Need to repeat trapping about 2 or 3 times a year. You won't believe how long your corn lasts in the feeders without coons stealing it and wind blowing it off the plates.