I have a flash boiler similar to green monties that I haven't actually used yet. I like the idea of steam jacketed kettles and have been researching ideas for producing steam efficiently. I found this hydro sonic pump earlier this week and my wheels have not given me a moments rest. It is a relatively simple device and I have a few friends that work in a machine shop. I am planing to build one and thought I would ask you for advice. I know there are a few engineers out there and this is way over my head. If any one has any ideas on seals or bearings I would appreciate the help. My current plan is an 8" x 8" aluminum drum on a 1" shaft spun at about 4500 rpms by a baldor 3hp electric motor that i will harvest from my band saw.