I used metal air duct and flower pot to build my feeder.
One, 7 in diameter by 4 feet long duct.
Two, 7 in diameter duct elbows.
One, 7 in diameter duct cup.
One, 1/4" by 10" hang rod.
Chain and hook
Four, brackets to mount the bowl.
One, Plastic flower pot.
Eight, sets of machine screws washers and nuts to connect the brackets to the bowl and the duct.
Eight, self taping metal screws to secure duct joints.
At this point the assembly is very simple all the duct parts made to fit in to each other, I had to secure the joints with the self taping screws.
Then I drilled two holes in the top part of the 4' duct section and slide the hanging rod through.
Next I drilled four holes in the bowl and in the bottom of the duct, I made sure that the bottom of the duct will be at list 1-1/2" below the top of the bowl and mount them together with the brackets ant the machine screws sets.
Great I almost done, I cut the chicken wire to the desire size an hang the feeder with chain to the top of the pen.
I used a lid to prevent moister and animals get in the food.
It has a capacity up to 75 LB.
Easy to fill up there is no need to bend over or get inside the pen, just pour it from the top.
I bent the brackets to fit in the space .
I used chain to hang it .
Inside the lid, I keep record of refill .