100square

I saw a few cones that ae 100mm long in each direction, but mostly theyre bulky and either theyre full cube or only a corner.
So with this square you can check:
1- length of prints x, y and z axis
2- extrusion rate... more like just an idea of whether youre over or under extruding..
3- see if your x and y axis are actually square by measuring diagonals of the print(a big one for me).

So heres the formula to edit steps on axis if you have a good extrusion rate and still dont have accurate sizes:
expected distance(e) divided by observed distance(d) times current steps(s) = new amount of steps per mm(ns).
So in short (e/d)*s=ns

Many uses 25mm cube but i find it less then desirable, as it is just so short distance.

After doing my extrusion tests and this, my printer now actually makes prints that will fit together.

And i hope it might help someone else.

Oh! and i designed another one with holes to save material... looks cool, but guess what- it doesnt save any material