I checked out a different brand master cylinder today only to find it had the exact same casting numbers etc as the one I bought. The brake guy said they are all made in China these days and reboxed into whatever brand. I'm guessing this problem is going to pop up every now and then if this is the case. I also contacted PBR Australia......they only supply the Chinese cylinder so I guess most/all of them will be too deep in the piston area as well.