Here you go Waka:
This jig is just an offcut of 6mm MDF wiith a 40mm hole in it to take a 40mm guide bush and a batten to reference it against the door edge. The hole is plunge cut with a router, 40mm bush and 35mm hinge bit.
I now use an 18mm thick jig with a 35mm hole with the bit guided by the hole & driven by the cordless. The hole will wear with use but just knock up another when this happens. You could add a couple of holes to pilot for the two fixing screws if you wanted.
From the underside you can see two screws that are used to adjust how far the hole is from the door edge according to th edoor gaps, thickness, etc.
This is the jig that I use to position the mounting plates, just a bit of 4mm MDF glued into a 4mm groove cut in some beech. The holes can be marked with a bradawl or one of the small sprung hinge drills . The set of holes closest to the edge (37mm) are for layon hinges, the others (37+18=55mm) for inset doors from 18mm MDF.
Jason