FrancesCoaster

I made them quite some time ago and I still have them. Will upload tonight when I get home.

Edit:
Here you go

To change the cars on CTs, you need ctr-creator V.1.
Go to Tools > Recover lost BahnDaten.txt from Ride.ovl
Navigate to Tracks\TrackedRides\ and then to the CTR folder of the CT (not the one starting with TrackCTR or it won't work), and select the ride OVL.
A CTR bahndaten will be created in the same folder, move it to the CTR creator folder, open it in notepad or your favorite text editor.
Change the car names as usual.
Find these lines (should be 57-89) and delete them.
ExcBase 0.000 IntBase 0.000 NauBase 0.000 ExcCircuitCount 0.000 IntCircuitCount 0.000 NauCircuitCount 0.000 ExcCarCount 0.000 IntCarCount 0.000 NauCarCount 0.000 ExcRideTime 0.000 IntRideTime 0.000 NauRideTime 0.000 ExcSceneryMax 0.000 IntSceneryMax 0.000 NauSceneryMax 0.000 ExcMaximumSpeed 0.000 IntMaximumSpeed 0.000 NauMaximumSpeed 0.000 ExcAverageSpeed 0.000 IntAverageSpeed 0.000 NauAverageSpeed 0.000 ExcRideLength 0.000 IntRideLength 0.000 NauRideLength 0.000 ExcSceneryInfluence 0.000 IntSceneryInfluence 0.000 NauSceneryInfluence 0.000 ExcAverageHorizGForce 0.000 IntAverageHorizGForce 0.000 NauAverageHorizGForce 0.000 ExcAverageVertGForce 0.000 IntAverageVertGForce 0.000 NauAverageVertGForce 0.000 If you don't remove these lines, the ride will work, but peeps won't ride it as it will rate 0 in the Excitement/Intensity/Nausea ratings.
 
Save the file, and run it trough CTR creator. It should work fine.
 
Warning: don't leave the CTR bahndaten file inside your Tracks\Trackedrides\CTR-MyCtNameHere\ folder, doing so will cause CTR bahndaten to build the ovl files in a sub-folder of that same folder, causing duplicated entries in the coaster list and/or game crashes.

Can now be found in the download section.
CWChaosPendelCFRCSO.zip

Hi @Elprod and welcome! Those 3d printed rides sound interesting, I'd like to see them!
For CFRs I'm afraid there's only one program that works for importing, and it's a very old version of blender. You can get by with Sketchup for anything else, but for CFRs you need to define splines and animations and blender is the only program that had a script written for exporting those to rct3. The script, made by blegabor won't work reliably (if at all) on anything newer than v. 2.48.
If you are on a modern PC you'll need to install Python 2.5.2 (32bit) to make it work.
For the models themselves you can use any program that as long as it can export to something the old blender versions will read (.OBJ wil be fine).
You can get all those files (the blender scripts, old blender versions, python and some XML files you'll need) here:
https://cfhrides.wixsite.com/cfhrides/tutorials
At the end of the page you'll find all the files, you'll need almost everything on that page, except for the sketchup files (ASE exporter, OBJ exporter and the addon) if you don't plan to use setchup, and the XML copy editor if you already have one (notepad++ or anything like that).
For the actual import process I used this tutorial. It's in spanish, but don't worry if you don't speak it (I don't, either). Youtube's CC translator works well enough to get the job done, and the screen quite easy to follow.