Has anyone tried making any of their own cards yet?

Well, sticks, stones and taunts are the most basic weapons available. While stick is a close-combat weapon, akin to the Assassin's Machete without the Crushing Blow, that breaks on a Critical Failure, stones and taunts are ranged weapons.
Stone, range 2-5, single use, kills target on Critical Success, caught by target on Critical Failure.
Taunt, range 1-7, unlimited use, ignores armor, deals no damage, can only target sentient opponents, target is Defenseless on Critical Success, you are Stunned on Critical Failure.

That's quite a stone! What does it do on non-critical success?

REALLY wish I had the digital files and final rulebook already, I want to start planning my Firefly campaign for my group, and I think I will have to homebrew the ship and space combat rules. After all, how will the primary buffer panel fly off otherwise?

I have a bunch of items and skills in a rough alpha stage, they don't work as is yet, as I've just marked them with the intended effect. Very few have actual rules text on them yet, just some keywords and such.

I'm toying with an idea to split Weapons and Armor into one/two handed weapons, armor, and shields/held items.

As such, a player could have a two handed weapon and some armor, two one handed weapons and armor, one one handed weapon, a shield and armor. Even a two handed weapon, a shield and armor, although that would incur a double Prolonged Complication for as long as they would be holding the shield.

Specific skills can be chosen to mitigate some of the drawbacks, when using two one handed weapons for example 'Ambidextrous' would remove the usual Turn Down from the first extra target attacked, although you'll have to specify which weapon hits which target if they aren't identical.

Still working on how to implement shields without making them either overpowered or irrelevant, I'll likely get back to those after the tools are out.

I'm definitely eager for the dev files. But I've started a lot of the design work. I don't have images, but it's easy enough to create background, stats, items and armor, spells/powers etc. then when the files are ready, just copy the text over.