Modified inserts for Minecraft Lamp

I found that the inserts were a bit of a tight fit.
There are a selection of STL files all slightly different sizes. Sizes are marked with the amount taken off each side of the protrusions. Eg. 0.05x2 is 0.05mm off each side of the protrusion.
I have also included the .ipt file (Inventor) and a .stp STEP file if you need to change it more.
There is a parameter to change the amount taken off each side of the protrusion which you can modify.