Stir Plate-3(ish)

So...this is a remix of a remix of a remix...I think. I just made changes and additions to what I wanted but started with the source files of this remix. Changes made according to the pictures... No rounded corners.

1) I made an insert to use in the original size plate hole because as you can clearly see, that 250ml beaker would go right through and I didn't want to somehow limit the unit by making that hole smaller. With the insert in, the beaker sits at the same distance from the magnet as