I just replaced my slideout toppers with the original Carefree ones. Way past any warranty. But even if you use the Tru Topper, you can install them the standard way, rather than drilling out the channel as the video shows. I used the Tru-Topper on my previous coach and they worked fine, but I prefer the look of the original.
John and Mary Knight
2015 Newmar Ventana 4311 - wheelchair accessible
2015 Cadillac SRX Luxury AWD