Mac's VersaTie Track in 18 Raptor
I used three 6' tracks. One kit of two tracks and fittings, plus one additional 6' predrilled track:
Track Kit - Surface Mount, Wide Contour (Series 3) - VersaTie
I added some M10 studs to attach the ARB slider and to attach the second battery behind the fridge.
M10 Threaded Stud
I skipped a hole on each track because the hole ended up right on top of the bed supports, leaving no access from the bottom to attach nuts. I drilled new holes in the track towards the cab end and decided to leave one hole out in the middle of each track.
Since I am OCD I'll go back at some point and either drill new holes or put rivnuts in the positions where the holes are over the supports.
Also on the OCD side...if you use a wide woodworker's countersink
82° Countersink - Lee Valley Tools you'll be able to mark the center of the new hole positions. The countersink that I used is wider than the access holes in the track so it centered for me. Then drill with progressively larger bits.
I installed the first hole at the tailgate end...I positioned the end of the track 5-1/2" from the tailgate end to miss the bed support. This placed that screw hole 6" on center from the tailgate end. Bolt the track down, then put another hole in at the cab end and bolt the track down. I installed the holes at the cab end 6" from the front wall of the bed. This cleared the bed supports at the front.
DRILL THE HOLE IN THE DRIVER'S SIDE CAB END VERY SHALLOW. I didn't and drilled right through the filler tube exactly through the band clamp that holds the tube to the rubber hose. I ordered the part and had the Ford shop do the install. It was a $300 boo boo.
Once you have your track secured at the ends, center punch the other holes. It is important to get these holes right in the center. I've got a set of transfer punches that matched the hole size, centering the position.
Transfer Punch Set - Lee Valley Tools
Then, without removing the track, drill a 1/8" pilot hole exactly in the center of each hole. Remove the track and drill the holes to size. I drilled mine to 5/16" for a small amount of wiggle room. The hardware is 1/4-20 stainless steel. No worries about galvanic corrosion as all of the surfaces are covered in paint.
Pics...not too pretty as they are upside down:
