mirror glass removeable?

We generally just be VERY careful and remove the old glass without removing the mirror itself from the car. We don't pry to hard or we will be buying a new mirror. Sooo pick out the old, make sure its clean, prime the mirror holder with urethane primer, cut a new mirror to fit (or order one), prime the back of the mirror with etching primer, apply urethane to backside of mirror, apply mirror to mirror holder.