surfmobile recently started a thread on his Penthouse roof rack install and
TexGX posted a picture of his Thule/Yakima track install (which is also what I used to mount solar panels to my Sportsmobile Voyager fixed fiberglass top).
But E-Track * 12 gauge horizontal track was recommended to me for movable bunk attachments on a jet ski trailer and in learning about E-Track, I came across L-Track which I think would be a great alternative to Thule/Yakima track for roof racks:
https://youtu.be/vcos-X1bYiM
http://www.cargoequipmentcorp.com/Se.../svs-kit-l.htm
Likely many of you guys and gals already know about these types of tracks. (Search revealed only a post or two.) So, I post for those of you who (like me) didn't.
*
https://www.etrailer.com/Trailer-Car...on/E19148.html