another thought… generate>Vegas… add to png change to image contour and use alpha. Fiddle with settings to get it to be one line and then you can use length as a trim. The only issue I see is that it creates the ‘stroke’ on the inside of the alpha but maybe that’s not an issue! hope this helps
*Correction… I forgot about the division on the face, you will need to do that process on each 5 sided shape, and have preserve groups on within the inset tool. and use the collapse command to merge the new points together.