WOW, a referral!!
Thanks Murdo!
Easy fix on the missing rubber stopper. On the pics that Murdo refers to, check out the last pic, I used super glue to attach two rubber grommets to the underside to prevent the wiper from touching the screen. Equally well, you can use rubber feet/pads found on smaller consumer devices such as aclock radio. Best to have some sort of padding to prevent scratches and possible screen breakage as reprorted by other members.
blue skies
Tony