We had two soft spots develop in the floor of our 2007 T276SR. One of these was in front of the refrigerator and had been there since delivery. The other was at the sill of the door.
Sorry, no pictures as we had We Come to U RV make the repairs and I wasn't there to take pictures.
They removed the vinyl from the main compartment and opened the chipboard to find the area in front of the refrigerator was caused by a 2' x 6' area of framing without any cross bracing. The area at the door sill was caused by the chipboard not extending over the outside board of the framing. Two cross braces were added to the "refrigerator" area and an extra piece of board was "sistered" to the inside of the banter board to support the chipboard at the door. The chipboard was replaced, then they went to reinstall the vinyl. OOPS...vinyl was stretched like a banjo string when installed originally, and it shrunk about an 1 1/2"!!!
Comparing new vinyl to laminate flooring, after looking at cost and warranty, we went with laminate flooring. Here is a picture of the new flooring:
We also had the cheap plastic molding replaced with cherry quarter round molding. Here is a close up showing new molding:
The slide didn't require any adjustment and the laminate floor is very easy to maintain. The only thing that has taken some time to get used to is the floor floats, i.e. it's not glued down, and after it sits for a while, it will buckle slightly. No biggie, after you walk over it once or twice, the bounce walks out of it.
Oh yeah, one other thing....our K9 campers don't like it because it is slippery to them!!!