Hey everyone, first time post here. I've saved up a bit of money and I'm considering buying a workbee kit to add to my shop if I can use it to make certain parts. One of the parts I'm hoping to make are nylon pulleys that a bearing gets pressed into.. very similar to the Open Build's V Wheels actually, but a lot smaller and specific to my application. Please see the attached picture (from Rhino - units in Inches) I see no problems cutting out the profiles (circle with a hole in the centre) and I think the operation for adding the groove on the outside would also be very do-able if I could add a 4th axis on the workbee. I know the blackbox controller is only 3 axis, but since the gantry wouldn't need to move for this operation, couldn't the blackbox Y-axis output be plugged in to the 4th axis? Also as a sanity check here, please let me know if I'm not understanding things.. - The blackbox controller runs "grbl", which listens via USB for g-code commands. - Control sends g-code to the blackbox - - Other programs can do this as well. (Mach 3, etc.) - CAM generates g-code. - - I can use any program to generate the g-code, or even write it manually. I'll admit to being pretty overwhelmed with how I would ever get software to do this right, but the operation to make the groove seems to be as simple as lowering the right-size ball-nose mill into the edge, and then spinning the 4th axis one revolution. Thanks for your time, Mike