After fighting my new larger batch of 10 gallons of slurry to resuspend it every few hours for each coat I have started to think about making a slurry mixer, just for when I am home and actively coating shells. Long term I don't mind the slurry sedimenting out for a few months when I'm not using it but it is a pain to resuspend it and waste 30-50 mins mixing it twice a day every day for a week. Not so much of an issue when you are messing around with 1-3 gallons, but 10+ gals is a bit unpleasant. I haven't seen too many designs for slurry mixers on the google. It seems most of them have a motor suspended over the mix and either have a gear reducer down into the slurry or a pulley system for torque. The part I'm wondering about is the propeller in the slurry itself. I didn't see a lot of examples, but outbackfoundries had a simple prop on the end of his shaft. It was pretty small. But that makes me wonder if it can adequately keep all the particles suspended if a relatively small area is being churned by the prop? I would have imagined something more like a bar going across the entire floor would work better or be necessary to do the job? Any ideas? Has anyone looked into this before and figured out what the prop/stirring part needs to look like?