So after hand mixing,hammer drill mixing and my homemade mixer i decide to make my job easy and simple,i already try with my old cement mixer but the surface on inside of mixer is damaged and not smooth so all sawdust stuck and it did not mix well,buying this new mixer is perfect and no hard work anymore,first i put 6 bucket of paper and than one full bag of sawdust,later i add more paper so the mixture of paper and sawdust is just right