How do you refine detail beyond the slider by keying in values (e.g. for scale)

I assume you are working on a phone or iPad? If so this is what I would do. I would sync your Rush project with Creative Cloud and then open the project with the desktop version of Rush. From there you can open Transform and find Scale. If you double click the scale number you can type in the precise scale you want. Or you can use the up and down arrow keys too to move by increments of 1. If you hold the shift you can move my increments of 10. The nice thing about doing it this way is that you can go back to your phone and continue working there. If you exported to Premiere Pro you can't take it back into Rush. Hope that was helpful.