I used a 3 inch elbow,traced around with sharpie and used my dremile tool to cut it out,a little at a time until the fit was tighta little caulking on the inside
I traced the elbow on the bucket and cut it with a dremel tool it fit very tight, the silicon has held up great looks the same as it did the day I put it on.
What's the difference if the food is sitting in the garage in a metal storage container waiting for a smaller feeder to run out before you go and get more to refill it, guess there isn't much of a difference huh.
Cut the elbows like Jimmy said, I turned the elbow around and placed it on the side of the bucket and by eeyeballing it you can see how far off the bottom it will be, mark the bottom edge with a sharpy if you use a 3inch from the line it should be 1 1/2 inches as a starting point for the...
I was thinking about using the 2 inch fitting but I didn't think the girls would feel comfortable putting their heads in such a small hole because they have rather large combs and wattles, Looks good and works great love this feeder.
Let me know how it works out for you, I kind of eyeballed it after I cut the elbow hold it to the side of the bucket and mark it for the height I was able to get it on the first try, keep me posted if you do it.
I built one that works great for me, 5 gallon bucket with two 90degree elbows that are about a 1/2 to 3/4 of an inch off the bottom of the bucket, they have to stick their heads in to eat and can't fling the food out so it doesn't attract rodents and no wasted food it holds about a month's worth...