I, personally don't use mpg. Keyboard with camera and touch plate are quite enough
You can buy cheap USB "endoscope" camera on AliExpress. I have one permanently installed on machine and it works with Karl's camera plugin.
Edited some buttons and added some DRO's on BigTex screenset.
Defined parking position, measured offsets between camera and spindle centre, ...

When i drill my prototype PCB's, they are NEVER aligned with X or Y axis, added some buttons with appropriate VB scripts (thanks Tweakie) to calculate the system rotation, .....

So u use the camera to set your offsets??

Yes.
I mainly work with wood and sometimes with aluminum.
All my drawings have origin at SE corner of the stock material (ie. bottom left) and Z=0 at top of the stock.

Camera like this one https://www.aliexpress.com/item/32722569743.html?spm=a2g0o.productlist.0.0.24f81244W3VdXk&algo_pvid=c492cac3-ca17-435f-890e-0f8fd4b63431&algo_expid=c492cac3-ca17-435f-890e-0f8fd4b63431-3&btsid=e5e7f15d-de80-49c2-b8b2-b1927a3be991&ws_ab_test=searchweb0_0,searchweb201602_2,searchweb201603_53

I see ...what do your PCB's do

It was some 8 years ago now but if anyone is interested in circuit board positioning and local system rotate the thread is here;
       https://www.machsupport.com/forum/index.php?topic=22932.msg160769#msg160769

Tweakie.

Hi Tweakie,
what do you think where the math came from

Buttons A, B and C

 

Tweakie.