As an addendum, I really want to thank Shylaah for all her help. If it weren't for all the tips she gave me I wouldn't have gotten anywhere.
Also, I was unsurprised by the other Jacks I encountered in the park. Jack Savvy and the others that I saw with him were all perfectly polite and friendly, but the others I bumped into really did fit the rude and snobbish stereotype I had been warned by others to expect. I don't know if they're on this forum, but come on guys, don't be like that. Feel free to talk about the flaws in my costume after I leave, but don't be a total ***hole and make fun of a guy you don't even know to his face. Despite those couple of guys, it was still a great time.
I'll keep updating this thread periodically as I finish up the costume. I'll be starting on the hat soon and the waistcoat will be done once I get the nerve to sit down for a few hours and finish it. A Zizzle pistol and Disguise sword are also on their way to me, which I'll be repainting and making a real leather scabbard and handle for.