Just one thing I should mention...
The design of the LFD Bars is why I bought a set. Being that they are raised slightly over the rails means that their tops (and the base of anything you put on them) is above the end caps. So, this means my RTT can be taken off of its aluminum rails and mounted straight to the LFD Bars for a very low profile.
When I don't have the RTT up there, I have a Rhino Rack mesh I can bolt onto them to carry whatever I need/want/shouldn't-have up there without damaging the end caps since the rack/mesh covers them.
...of course, all of this is in theory since my LFD Bars are on their way to me right now, and I will be picking up my Roam Adventure Co RTT after the bars come in...
:behindsofa:
I still really like the idea of the aluminum T-Slot bars. I hope to do this on a trailer build once I have the money to do that. Then I will throw the RTT and the awning on that, and use my roof rack for other trouble. Towable Base Camp? That's my kind of camping.