I started playing with RC3 the other day so I can compare geometries between my TC3 and TC5 to figure out why they behave so differently. Problem is, the chassis models on the website for those cars don't include the steering geometry, and some of the basic parameters on the TC3 are so far out (eg wheelbase is wrong by more than 5mm for kit setting) that I can't really trust any of the numbers. Not a dealbreaker, I'll just have to measure the whole car from scratch. I kind of needed to measure some of that already as I have a partial TC4 front end (shock tower and inner camber link braces).

The bigger problem though is that the TC5 uses a single bellcrank system. There's no facility to specify that in RC3. Are there any plans to implement this?

While I was trying to experiment with the bellcrank numbers to see if I could fudge something close to a singe bellcrank, I entered a 0 in one of the fields. The software didn't like that and I got stuck in an infinite loop of error messages notifying me that calculations were overflowing. I had to kill the process with task manager, losing all my unsaved changes. The UI should probably catch these errors and revert the number back to the previous valid value to avoid infinite loops such as this.