Did it... Caught the corner of the slide with my noggin!

Yuppers...been there done that but not as bad as you. We bought a swimming pool noodle, miter cut for the corners, then glued angles, cut slit down to the center. When we park we slide one over each corner and try to remember to remove them before we pull in the slides! It helps but...it is still easy to bump the head so we generally do pull in the slides before we do any work around the rig.