i just put my RCI sliders on my '16 TEP w/ KDSS monday.
it took me about 3 1/2 solo, and without any jackstands etc.
i used a plastic toolbox i had to help hold them while i moved them into place. once i could get one bolt at the opposite end of the toolbox, it was easy to get another in and go from there.
regarding the e-brake tab, i just cranked it down and it moved into the slot cut in the slider plate. don't think it fully went into that hole, but i don't think it's going to move. i had a time getting that bolt in, i guess that bracket was tweaking the angle, but it wouldn't go in.
the driver's side w/ KDSS was a bit more "fun". ugh. some of those bolts are really a pain to get to to tighten down. a few the socket wouldn't fit, or you could only get one click at a time on it and it took 15 min to crank down one bolt.
once it was done, it was all good. powercoating is great, they look extremely well built and my wife and son liked them as a step. really for protection duty.
i ordered them feb 24th and they shipped march 31st, and got 15% discount and no sales tax, and had great communication with them they whole time.
happy RCI customer!