Thank you, pmclemore, a simple solution to an annoying problem.
BTW, I received the replacement valve and I just figured out that the tab does not have to be turned all the way forward to close. It closes as the tab points away from the trailer and opens pointing backwards. So, less turning to do and less chances of breaking it. Regardless, I'll try your aluminum channel idea for less effort.
2004 25' Safari
2010 4x4 Ford EB Expedition