[ludocode]

8BitDo makes great controllers. I have an SN30 Pro, a Zero 2 and a pair of Ultimate Cs. All of them have been used extensively and they are all excellent quality.

On the other hand I've had back luck with generic NES and SNES knockoff USB controllers. The quality is much worse than the originals especially in the D-Pad. It seems nobody but 8BitDo can get this right.

If you stick with 8BitDo you'll have great quality but they don't necessarily match the form factor of the originals. I can see why OP would want to convert a real one.

[onli]

The form factor is really close though. Ignoring the added buttons, which is completely possible while gaming, it does not feel much different. https://www.onli-blogging.de/uploads/sf30pro.jpg for an example picture :)