ZOMBIE THREAD ALERT - I'm going to try a couple of these. I used Rotel cans, punched holes in opposite sides (to preserve balance) of each end with a regular old-style can "punch" opener. I had to rod out the Rotel pulp with a chopstick. Tomato sauce or beef/chicken broth cans probably would have been better in hindsight, but the Rotel can size seemed just right. Cut a little circular cardboard template to drill EXACTLY in the middle of each end. So the can spins perfectly with next to no effort.
Now for my questions for experienced users:
1) what is the best distance down in the bucket for the can? This seems that it would be critical to prevent mice from stretching out from the up-ramp or the bucket rim and robbing the bait without slipping in. The designs I have seen on the web vary, but typical looks to be having the TOP of the can just below the top rim of the bucket, maybe 1/2"-1".
2) how far should the up-ramp extend past the rim of the bucket, and should it be aligned with the can "axle", or perpendicular to it?
3) would squared off cat litter buckets work fine instead of round? I can't think of any reason they wouldn't.
- Jay