I m working on an inverted terrain ish style coaster, I built the custom layout on planet coaster and im building it on my twitch every day over christmas and new year. ive compleated the large loop, and you will have to go over to my twitch to see the layout I intend to complete. on planet coaster the train makes It round with a 1.5 x friction multiplier so It should be possable with knex.
just go over to twitch.tv/thegamingninja08 to see the layout and the construction pregress as im littaraly building it on stream day by day lol