So last night I put my Mp10 in nutrient export mode and the wet side started spinning. I opened it up and found the ceramic or plastic piece that slides over the metal shaft is broken. I know they sell that part but don't know if that would be the only issue and don't want to buy something if that's not the fix. Has anyone had this issue before? Do you know if that is the fix? Lucky for me I have another mp10 to replace it but I still want to fix this one or replace the wet side if it's not worth fixing. Thanks