Yes I'd like to see that, too.
Just as an explanation of what I've done so far and why, I'm going to quote here from C.W. Ammen's "The Complete Handbook of Sand Casting" 1979:
"Melting cast iron in a crucible is actually so simple, it's a wonder more people don't do it.
"The usual practice incorporates clay and graphite crucibles. The iron, free from contaminants (anything other than iron) is broken into small pieces, the size of walnuts or a little larger. The crucible is charged (filled) with alternate layers of charcoal and iron, to which is added about two handfuls of soda ash. The soda ash can be placed either below or on top of the charge. After you have gone this far with this process, cover the crucible with an old crucible bottom and place a circular piece of corrugated cardboard between the base and support block to prevent the crucible from sticking. Start the furnace with the flame set to slightly oxidizing.. Gray iron melts at about 2327 degrees Fahrenheit. Although this figure may look large compared to that for the melting point of brass, you will find that the layers of charcoal promote rapid melting that can be done in not much more than the time it takes for brass. With a little practice you can produce high grade iron castings. (Old cast-iron steam radiators can be easily broken up to produce an excellent source of very fluid iron.)"
My first casting, and the most successful so far, followed this procedure exactly - including making a clay cover for the recommended "clay/graphite" crucible and incorporating charcoal, and soda ash, as well as the radiator source metal. Unfortunately the soda ash seemed to soften the crucible after only a couple of melts.
I own and have read probably 10 books on casting, including the extensive online US naval casting manual. Almost all provide alternate and even opposing views on all aspects of casting, including casting flaws, sand recipes, etc.
It's clear to me that the truest line above is "With a little practice you can produce high grade iron castings."
A little practice....that's what's more commonly called experience. There are no absolute recipes for success. Only a process towards it, experience, where you learn and discover the special requirements of your own equipment and materials and your own capabilities.