Per my experience, good rubber mat is what holds TC on position with normal driving.
Tie-downs are needed for extreme situations only.
Also if you have trailer hitch on your F150, you can easy DIY rear ties. Lot of pictures on forum, but this is not a big brainer.
Not much you can do fitting curved frame for front ties, so Torklift design is probably the best.
What I also notice on my aluminium bed - the ribs on it end about 2" before bed ends, so my long camper would collapse them on the edge. I made a strip of plywood to fill the gap under factory mat.
