umm im up to here:

7. Upload this 3 files(customize_upgrade,executor.jar and executor.b) in /tpa/preset/custom/ with jdflasher
i used the qa2020 script and connected.
Then i tried to enter bflash but i get an error:
SetDirectory(setdir(setmode(run(gethello(IOUsb::ge tblock(time exceed))))))

sorry for the double post.