IMO soldering the Regulator is easiest part so I would go for it and have BT powered from USB.
About the sync - original Wii BT needs sync only once, then it remembers pairing.
It means that after You connect it to PC, You need to press "Sync" in dolphin and red button on Wii Mote, but next time You just press 1+2 and it connects without problems, so You may consider that "red button sync" is just "one time" ...
About the sync - original Wii BT needs sync only once, then it remembers pairing.
It means that after You connect it to PC, You need to press "Sync" in dolphin and red button on Wii Mote, but next time You just press 1+2 and it connects without problems, so You may consider that "red button sync" is just "one time" ...
Windows 11 Pro| Gigabyte x570 Aorus pro | 5800x3d | 2x16GB 3600cl14 |Gigabyte RTX 2080 8GB Gaming OC | Wii Bluetooth Module (WML-C43)
2x Wii Remote RVL-CNT-01 with MotionPlus | 2x Xbox One controller
2x Wii Remote RVL-CNT-01 with MotionPlus | 2x Xbox One controller