Photos as Requested
The first picture shows the before and after. I cut the slotted end off the screw driver (it has a phillips as well). Then welded on ~3/4" of 2mm allen key. Grinded the weld to a smooth taper, then used a sharpie paint marker to give it a coat of paint.
Close up of the end. I had everything plum to each other, but as things goes, when it cools down it shrinks, and as the weld cooled it pulled the key out of plum.
The screwdriver came from autozone, just some of the cheap tools at teh register. I had originally picked a couple up hoping they would work as a carb adjust as I wanted one w/ the pocket clip, but they are to big.
If I had wanted I could have made a jig from a 2x4 that would help help keep it all plum.
dw