We tried a topper on ours and did not have good luck. The topper slid down when the murphy bed was in the up position against the wall. It was a bear to try and pull the topper up and out since the bed would not lower away from the wall but a few inches. We took the topper back to Costco.
Henk the German Shepherd & Family
2006 Toyota Sequoia
2015 Jayco Jay Flight 23MB Elite
Previous RV's, 1988 33-foot Class A and 1994 Flagstaff Pop-Up