TG why not think hair props and do like the hair vendors do and provide a mat pose that shifts and scales the prop to fit M3, M4, V3, V4, S3P. Most multi figure hair props, the hair loads high or low and bigger or smaller then the characters head (except the base figure it was designed for. Then the vendor provides a mat pose file that shifts-scales it ti fit correctly on the new target figure.

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"