Made this from scratch in TinkerCad to be added to our table top RC Crawler course for the 1:24 scale crawlers we have. It's pretty simple as far as mechanics, I made the ramps two piece so you could place them on a bed easier if you have a smaller print bed. The other reason was since you'd be using M8 screws it adds extra counter balance weight to bring it back down to one side, I added multiple nuts to it to add extra weight and works perfectly.
I added diamond plate pattern to give extra texture for traction. You don't need the caps for the base to hold the ramps down, but doesn't hurt.
I super glued the approach ramps to it, but I guess you don't need them but makes it longer, but with added weight of bolt and nuts it will still come back down to one side even without the approach and departure ramps if you didn't want them.