Instruct: Classify the given review as either positive or negative.
Query: Doesn't work on Etrex Vista CX

The Vista CX also has a memory slot that blocks proper mounting of the back. For this model you only need the rail mount part (010-10496-01). The Vista CX comes with a clip that screws onto the back that will attach to the "rail mount adapter."The back included in this set is all plastic. The back that came with my Vista CX is rubber coated metal. The plastic back seems well made and looks like it would seal well against the back of the GPS. The rubber seal is well attached and looks like it would do a fine job of keeping water out of the GPS unit.Garmin Rail Mount Adapter