i had a similar prob  with V4 and couldnt find a solution that worked ...i had to settle for a work-around of setting min/max in the paramater dial for head size on the body level to zero(or whatever you want)... if its a personal use item i think this works fine, if its a sale item this is not an option .... hope you find this helpfull...

 

:O)

Y'all have a great day.