Lionel Fasttrack Ceiling Track Holder

I picked up my calipers and put this together. It's specifically for the Lionel Trains Fasttrack system of tracks. It's meant to be at a spacing of every seam, so wherever the tracks connect, the seam should be centered to the holder.

It's been mounted for a month or so now and has held up pretty well. But I can't guarantee all surfaces and weights will be ok, or offbrand command strips (velcro). I'll lay out how I set this up. 

1. Prints are all in PLA, I used Elegoo PLA for this: https://amzn.to/40pXqZt 
2. My ceiling is a standard ceiling paint, or flat coat, not eggshell or glossier. 
3. I cleaned the ceiling with rubbing alcohol and allowed it to dry before attaching the strips.
4. I used hook and loop command strips for this (these are all affiliate link: https://amzn.to/3Pq7rzP. Costco also sells them at 30+ packs.
5. You'd need to print a total of n-1 holders, where n is the total number of tracks to be used.
6. For each holder, there's spacing for the command strips, I suggest tongue out.
   1. Strips on the ceiling also should have the tongue facing away from the wall.
7. For each holder, sand the area where the strips will be attached: 80~120 grit to roughen it up.
8. I applied a line of CLA glue to the holder and then placed the sticky command strip to it… for extra hold to the plastic: https://amzn.to/40n3NNk 
9. Then I planned out the locations for each holder, and used a random block to space away from the wall, and placed the first holder.
10. Subsequent holders I used the jig to quickly place the command strips.
11. Curved ones I eyeballed and did one at a time using the actual track. I was running out of time and couldn't cut down the jig to fit on my printer at the time. 
12. The tracks can either be slid in from the left or right of the holder Or….
    1. …They can snap in by putting a leading edge in and snapping the side closest to the holder's neck down into place.

NOTE: I let the glue on the holders set for at least an hour before hanging, and I let the command strips sit on the ceiling for a …. well…. anywhere between one minute to a few before attaching the holder.

NOTE: Please see my 2nd and third point again… 

NOTE: While this has held for me pretty nicely, especially once everything is sharing the weight, before we got there, it's definitely possible to knock things down if you're not paying attention to your elbows and arms, so be careful.

NOTE: to the last point, don't mount the trains or worse the engine, until all the pieces are up (one to test is fine, as long as it's not the engine).