The expectation is for Cast Steel outer shells and machined inner parts. Although the polymer engaging mechanisim on the AVM hubs that I convinced AVM to start making work flawlessly, I will be using metal engaging mechanisms on my 5 ton hubs. All of the work will be done in the USA, primarily in Upstate NY. As cost estimates come in, I will be able to figure the selling price. No matter what, I will build some for myself and any one else who wants them. JT out