This kit has a narrower color spectrum compare to KAT iron. R2 and R3 color matching will be the key here, getting the saturation and hue is really crucial, and the slightest mismatch, say in R3, will set you back to redo the color match for R2, and vice-versa. Is it possible to get a color match before GB?
If this is done properly, this is going to an amazing kit.