I have been using Onshape for almost 2 years now, and I was so excited when I found out that Onshape was adding a CAM Studio feature. However, throughout my usage of this new tool, I have run into a few issues. First of all, I have access to a wide range of bit types at my disposal. However, some types are not included as a tool option, such as engraving bits and corn bits. Secondly, on the same line of thinking, with such a large number of bits, I would love to be able to import a tool library from my computer, but I am unclear what file type is required for this import, and the types I have changed are unsuccessful. Finally, it is an option when creating a Tool Path to "Force Tool Change." The Onshape help center itself also states that "Force tool change forces the tool to retreat back to the tool change position before the next operation is executed." However, whenever I enable it, my machine (In Onshape I am using the 3-Axis Generic Milling -GRBL machine) does not do anything differently. In short, my questions are:

1. How do I add different kinds of bits, such as engraving or corn bits?
2. What file type is required for a tool library import?
3. How do I make the "Force Tool Change" function actually have an impact?

Thank you so much in advance for your time and answers.