Lighted circle straight drilling aid - GIF

[freddo4]

This idea could be useful for tramming a mini mill.

[Bony]

Ebay (Au) has inexpensive laser pointers, pull them apart & simply wire up 3 of them. https://www.ebay.com.au/itm/39414359...mis&media=COPY

[BuffaloJohn]

This idea could be useful for tramming a mini mill.

I don't think you would like the accuracy of tramming with this type of tool.

It could certainly be used for quick coarse alignment. But - I think I could eyeball it close enough for coarse alignment that I would skip this tool for tramming.