Injectors are great shavers. I believe from your description that you are doing the work instead of your razor, or perhaps you are taking passes without cream. Injectors require a light touch, they are sharp with a heavy blade. Ease up and take your time. Reapply shave cream even for touch ups. Let the razor do the work and use three nice gentle passes. You'll find you have a lot less irritation. I believe if you use it daily you''ll have the hang in less than a week. Happy shaves.
"Truth is treason in the empire of lies." - Ron Paul