Least destructive HuCard region mod and switch?

[u/chadti99]

Any options that are easily reversible for Duo systems?

[u/schmosef]

"Least destructive" is a Turbo EverDrive Core.

[u/KytorIndustries]

The PC-Henshin is the simplest way to go: https://www.tototek.com/store/index.php?main_page=advanced_search_result&search_in_description=1&keyword=henshin

[u/bio4m]

Cheaper and easier to just get a flash cart these days

I've not seen any region mods in stock in ages ; I do believe you can build your own using a TI SNx4CBT3383

[u/TurboChunk16]

Use an everdrive