For those of you who have been having problems understanding the 'feet' in the Sonic and Tails patterns, I've put up a picture rich tutorial for them here: http://oth-help.blogspot.com/2013/03/sonic-foot-tutorial.html .
Some of the other patterns have the same (or similar) style of foot, so it may help with some of the other patterns as well :D
Hope this helps those of you that have been having troubles with the 'foot' instructions for those patterns :D