I've been reading elsewhere that kayfun clones (not The Russian) are having issues with rust forming on the screws, positive post, and deck. Apparently QC in China doesn't care about using food grade stainless steel for all their parts which come in contact with juice. I can't speak from personal experience, as I don't own any of the said clones. I don't know, but rather assume, that the suspect devices are the ones available on FT. Be advised.