Pix of my roller compost bin should be self explanatory. I can not take credit for any ingenuity. I simply took ideas from the bins I liked and compiled them into this one.
My thoughts about the large hole on the bottom or end side as being superior are due to easy compost removal.
I noticed that I would have issues with easy addition of compost material from the kitchen if this was to be a roller style compost so I like the small side hole to add compost material from the kitchen and such.
I did slight improvements on the base and roller system and added the roller system because it seemed the most reliable and easiest.
I had all parts from old scooters and roller blade wheels also an easy purchase. The PVC was from the hardware store. Total cost was $44.00
Lucked into two drums for free.