Hmmmm....interesting info about the counter extension. I will have to investigate further. Did your trailers come with the extension brackets or hardware already installed on the side of the cupboard? Do you have a tiny little door which flops down to hold maybe something like a sponge, located the top where the extension brackets should be installed?
Improvements - my husband added an electrical outlet near the table. Our old trailer had outlets on the slide which were well-used and we missed them in our new trailer. He also removed the top off the night-stand in the bedroom and shaved off an inch or so on the wall side. Before, the mattress fit so tight we could hardly make the bed because my hand wouldn't fit down the side. He put the top back on, re-caulked and it looks as good as new. Now I can stuff the bedding down the side without hurting my hand. We are in the process of adding a few more half-shelves in the pantry to take advantage of the height between each shelf. On the pantry door we installed wire racks to hold boxes of wax paper/foil/plastic wrap along with boxes of plastic storage bags (ie Ziploc) for easy access. We are also installing a board under the wine bottle rack so we can mount tracks underneath to hang wine glasses. We found metal tracks at Menards. I also saw videos on YouTube explaining how to make your own tracks out of wood. Perhaps the wood tracks might be a better choice to eliminate bouncing (tighter fit) while traveling It would be a real pain to pull into a campground and find broken glass all over the trailer!!
Tip: I cut one of those plastic pool noodles into 2 pieces about a foot long. When it is time to travel, I slip them on the side of the dining chairs to keep them from banging together. I store them in the seats when not in use.
We've had 3 trips out before winterizing and found a couple glitches. On our last trip, the refrigerator quit working. Luckily it was just a loose wire. The clock on our radio also ran fast, gaining about 5 minutes each day. The radio also came on by itself a couple of times. Our dealer is replacing the clock/radio. They are also replacing the kitchen sink pull-down sprayer. A small black gasket or ring was broken allowing the sprayer to drop down. I hate to see them replace the whole faucet though, just for the sake of one little part! And last but not least, the dealer replaced our dump hose. The first time we used it, it sprayed like a garden sprinkler! So far our dealer has been very good to us so I'm not complaining.
I love hearing your ideas so please continue to share. Happy trails!!