Yes, I know what you mean. You need a feature, so that the GDT will be attached. Even if you dimensioned to a common plane, the control box will not attach to a plane. I've put in an enhancement request already, maybe you should too? Also, I have found that the GDT boxes can not be rotated. Awful when you have many! angled surfaces. So many leaders and boxes all over the place, makes for a messy drawing. Sorry I could not help much.