Aluminum cylinder heads

Always breaking adjusters. I finally bought a new set of adjusters and it was ok but it made me seriously questions their quality.
A couple of my friends along with myself have also had problems with Crane adjusters breaking. Never had any trouble with the rockers , just the adjusters. The first thing I would do if I was to buy another set of Cranes is to call Smith Brothers up and order a set of their adjusters. I would think that Crane would have already addressed this issue.