One star deducted because it didn't come with a bleed kit like some others. Also, I worked as advertised. The instructions say to use plugs and a pump until almost all of the stroke is gone. I thought I did, but I ended up with air in the master. Rookie mistake is my fault. Since my foreman stands quite steeply during installation, I can't get the air out. So I take it out and try again. Morale - order a boost kit for $8 or $9 here.