Expanding helping objects on printing surface

idea is really simple: you need several things which not many 3d printing softwares can do: you need measuring ruler in all 3 dimensions, you need simple objects without 3d modeling, you need helping hands on 3d printing surface.
All you need is this package which will surely grow during time. If you have any new idea, feel free to share in comments.
This pack contains:
simple cube 1x1x1mm- idea is that, when you need precise measurement on printing table that you expand (scale) that cube i