Sean M76:
I've done four of them. First two scrapped, third and fourth were great.
My advice:
Recommend a drill press, which you have, and router. A plunge router would be perfect, but I used a new Ridgid 1 1/2 HP Compact Router. I think the sku is R24012. It worked very well. I think technically it's called a laminate trimmer, and it comes with that bit.
Without the plunge feature, you manually lower the bit by about 1/8" each time you make a pass, and carefully put the bit down into one of the holes you drilled with the router, then turn it on and make your pass. Also, do not ever raise the router out, until it's stopped.
If you're not sure about the runout on your drill press, drill some holes in metal and check how your trigger and hammer pins fit. If runout is excessive, they will be too loose. Ditto for the larger hole for the safety.