Haven't been able to work on the problem yet as our RV has been in for warranty work. However I purchased three nice size L brackets, and plan on screwing them into the wood base the mattress sits on. I then plan on covering the bracket section under the mattress with duct tape to keep any rough spots from damaging the mattress. Will let you know how it turns out when I can actually do some alterations on our RV. I found L brackets that are app. 3" by 3", painted and smooth. I had to drill holes in them, but I think they should work.
__________________
|