YoungBlood
Jolt the Squares
I doubt any more than 1% of DIY Home Hobbyists out there would care to tackle adding this to their skill set and resource network, but, its rad so enjoy!
http://www.jalopyjournal.com/forum/showthread.php?t=464599&highlight=sand+casting
http://www.jalopyjournal.com/forum/showthread.php?t=689181
http://www.jalopyjournal.com/forum/showthread.php?t=464599&highlight=sand+casting
http://www.jalopyjournal.com/forum/showthread.php?t=689181