HI Zeric,
I used Tuya-convert for two BW-904 color bulbs but on a reflash (trying to get Templates) I bricked one. Have disassembled it and want to do what you did above. I posted the pics at
https://community.home-assistant.io/t/support-for-the-merkury-light-bulb/53456/46 with all the info I have now. Need to get bed.
No much luck yet on finding Tx and RX but wonder what you used to get it into program mode?
Thanks