But the quality of your shots is pretty good so far, I'd say to keep experimenting with your setup.

Tim Boyd has published some excellent how-to and suggestions for the best way to photograph miniatures, worth revisiting those articles for tips.

Had the privelege to work with the world's best car shooters in 1:1 'back in the day' and they referred to the practice as 'painting with light,' when doing studio work. The studio would be dark as a tomb save for the subject vehicle and there would be infinite fussing with the light boxes to get just the right feel.