So I got both the RTS and United Perceptor to make the Ultimate Perceptor. The arms are on ball joints and just swap very easily. The colors match too. The middle piece of the shoulder canon pops off and can be swapped easily too. The chest piece is 2 parts, the window and chrome piece. You have to remove the pin to swap the parts. Once finished, you have a HENKEI Perceptor. I think it makes the RTS look better too. Why have dull paint apps and then shiny chrome? Also I posted the microscope mode.