Melanistic inhibitor prevent color in certain parts of the animal. Like when you see a really dark bird as Don says he cull with white legs... WEll that should be culled as there is an inhibitor that is in wheaton... preventing the black from covering the leg though the rest of the bird makes sense. I am not well versed enough to understand all the inhibitors for Wild type, brown, duckwing, eWh, birchen etc... I just know when things are out of place...it means "something" The legs usually eWh. Does this help?
If you find when using the bird downstream that you get something "interesting" please share it with the group. I ended up with Wildtype from Cockerels with the same color as yours, bred back to thier daughters.... doubling the gene, which is necessary for the presentation... It may never show up if you don't breed it to a sibling or daughter. It does not appear to have any wheaton markers that I can visually see. This is the fun part of the project.... finding out what is in your box of chocolates.
Thanks for the pix and I must say they are handsome low riders... gotta luv dem lowriders!!!