Anybody use E-Track for securing things?

I have been installing it in my trailer and so far really like it. I haven't actually used it yet so I thought I would ask some opinions, maybe something to be mindful of.

I'm trying to put in a piece of equipment, then place track for it keeping in mind how much room power will need and where the loads will be.

It came to mind today what if I wanted to carry the big gas bottles, I planned on the small 80 size but not the 225's. So they might be laid down unless I build a rack and strap to the tracks. What works for that?