Quote:

Note: You are going from a LARGE .040" IFR down to a SMALL .025 size.



Putting a .015 wire in a .040 orfice is MUCH bigger than a .025 orfice. You can almost stick 3, .015 wires across the diameter of that hole.

Think surface area. That situation with .015 wire makes the .040 hole about a .037 orfice.