There’s probably a bunch of reasons for the multi wing design, but the big one is going to be improving lift/carrying capacity without increasing the width.

The most efficient wings for low speeds are glider wings: as long and thin as possible. That makes them inconvenient to pack and folding joints are weak points. The second wing adds lift, but also problems: it’s less efficient than a single wing of the combined length would be and the front wing makes the rear wing less efficient. The winglet improves the situation somewhat. Facing downward also improves maneuverability.

It’s a little weird and very European, so OpenSUSE.

• Banana leaves will work fine if they’re more accessible. It’s a common substitute in other countries. You might even be able to use paper, really. It just has to keep everything contained during cooking/storage.

• Masa is basically just nixtamalized cornmeal/cornflour mixed with water. You can make nixtamalized corn yourself if you’re willing to go through the effort. If you don’t, unnixtmalized cornflour works. It’s not bad, just different.

• Where does milk come into tamales?! Unless you’re doing sweet tamales or trying to make cheese, tamales don’t involve milk.

• Any chili will work, even thai. Add some capsicum if you want more of that pepper sweetness but all you can find for heat are small thais. Alternatively, use a recipe intended for chiltepins or pequin chilis. Mexico has hundreds of different chilis and all of them are used to make salsa. Just make sure to use white onion, not sweet or yellow. Throw everything in an oven till it’s blackened, add cilantro/coriander, blend, season, cool, eat.