We also added the memory foam topper to our king size bed in our 2015 Georgetown. Actually sleeps better than our home bed. Surprisingly, the piston arms would no longer hold up the increased bed weight for access to the storage. The dealer added heavy duty rods for about $20. They work great.
We purchased a camper queen from a mattress store when we owned our travel trailer.When we purchased our Sunseeker we swapped the mattress and gave them the new one for our travel trailer as ours was much better quality.
The people who bought our trailer from dealer were no doubt happy to have a new mattress!We were at first concerned ours was too high when slide went in but because it was shorter in length it worked!You would think for the cost of these units,they could provide a better mattress.A good nights sleep is a must especially as you get older and more aches and pains!LOL