I am considering using a preheated 500F/260C cast iron comal or a preheated aluminum baking sheet.
Are you referring to a tuning machine or a bridge pin? Single bridge pins cost $1 and yes you can buy just oneTuning machines may or may not be available separatelyIt depends on the type and if the store has any older used ones that they can sell youThey are NOT sold separately brand new.
To be honest the only way to buy a guitar that you'll like is if you go down to a guitar shop and try out a lot of different guitars and accessoriesEvery from straps to the action of the strings can determine what you getYou should also consider an amp along with thisExamine as much as you can about the guitar and whether you like it or notThick or thin neck, what kind of neck you want, smooth or rough G string on the guitar, these're all things you should consider when buying a guitarAnd also I don't mean to sound like an annoying parent but you should set a general budget to stay on when buying guitarsIt's really easy to get carried away with guitar stuff but then you're money's gone just like thatSet a price range for what you want to spend in total and you'll be even happier with your purchase should you make one.
any baking sheet your pizza will sit on works greatI have a round tray someone destroyed years and years ago that I use for pizzaI think my grandmother said her bro in law baked something on her pretty blue tray and ruined its finishSo she scoured the burnt paint off and used it for a cookie sheetor you can use a double sheet of heavy foil and flop the pizza on it! Requires something solid when you pull it out of the oven such as a good sized wooden cutting board I turn the oven to 400 to 450 to bake pizzajust set temp of oven when you start to make your pizza or enhance the frozen ones!
