I've been looking for options to add crossbars to my Riverside Whitewater Retro 509, and came across this video on YouTube. It's for a different brand of trailer, but I think this could be adapted for pretty much any trailer with rv molding/trim.
I would love to hear input from others on this setup.
He modifies the square bolts for Yakima Skyline Towers designed for a flat roof and inserts them into the trim pieces. I'm not 100% sure about the internal structure of my tear, so I like the idea of not drilling additional holes fishing for a suitable mounting location.
Parts List:
Landing Pads: #8000221
Skyline Towers: #8000148
Roundbar SL Adapters: #8003536
66" Roundbars: #8000410 (Note: Depending on width of trailer you may need a different length bar)
Here's the video (skip parts info section and go to about 2:58 in the timeline to see modifications and install)
https://www.youtube.com/watch?v=oU9pnNPzsWE&feature=emb_title