While making the tool holders for my QCTP i got a bit over enthusiastic with one of them and the dove tailed slot became too wide for the QCTP tool post. What to do?

Scrap it? No, no, but hmmm, I do need something to mount a work light on my SX1L-mini-mill, perhaps ....
Yes of course, split into two parts and align/join them using two guide pins and a screw for tightening. A small angle on the side will be the mount for the light.
At this point I have split the former tool holder and made two pins and the tightening screw.

That done and time for the little angle bracket for the light. I decided to round off the part that holds the light and wanted to do that on the mill to make it truly round. To do that I bodged together a pivot that can be nipped in the mill vice and a screw stud around which the work piece can rotate.

To avoid the whole thing rotating while milling the sides, I drilled and tapped a short hole in line with the stud and put a small and short screw into it. Nipped the item in the vice and milled off the sides.
Worked well and the support was secured in the mill vice ...

and the little angle to be put on the stud and secured with a nyloc nut.

Held tight with a welding pliers it was an easy task to round off the angle. As can be seen, I had made a rough cut with a hack saw before rounding off to make it easier on the mill.
After that the angle was cut to measure and cleaned up. Fitted very well at the end of the mount and time to make the securing nut. I decided that it had to be a nut that had three small spokes instead of just being round and knurled. This be<cuse one gets oily and then looses grip even on a knurled nut. So three small peg spokes was made by eye - as can be seen - and fitted to the nut.

have to fix that later.
First time assembly to make sure everything adds up as intended. It did and looks as follows.

The angle for the light is fastened opposite to the securing nut with just one screw. This as the angle gets support from the mill column and will not move.

I chose to fit the light with the cable towards the mill columnto avoid long loose slings of cable that can be caught by anything.
a test fit on the mill shows that it works very well - sorry for the out-of-focus image, the camera decided to focus on the vice instead

By securing the angle bracket with jut one screw in the center, it is possible to move the light to the other side of the mill just by rotating the angle 180 degrees as can be seen below.
Same crappy focus I am afraid, but I hope you get the idea.
Anyway, I did not have to scrap the goofed tool holder but instead made a useful little accessory to my mini mill.
BR
/Peter