I have an early production Columbus. After being back to the factory 4 times, I haven’t had any major issues. Knock on the fake wood they use. Unfortunately I see later models with many construction quality issues. Grand Design wasn’t popular back in 2012. If I had to do it over again knowing what I know now, I would have bought a Montana. I’m too far upside down in it to sell it today so I’ll have to hang on to it for a couple more years. Good luck and keep those emails and calls going to Columbus to get your rig back for repairs.