can't exit u2s diag download mode(spl erased, spl backup lost, chsize error, autodloader ...)

[Ranomez]

Hello!
I attempted unlocking the bootloader of my Q5 using this tool but now can't exit out of the download mode.
While the batch file was executing I did see that "chsize spl.bin" returned "The file is not sprd trusted firmware" so I'm guessing it was a bad dump but since the first command already erased sploader I couldn't really do much anymore.
What can I do in this situation to fix my tablet? Would I need a spl dump from someone else? If so how could I get one?

[Ranomez]

Extra details: checking the spl.bin file in a hex editor shows it's empty.

[TomKing062]

copy u-boot-spl-16k-sign.bin to spl.bin
only execute last command
spd_dump fdl fdl1-dl.bin 0x5500 fdl uboot-mod.bin 0x9efffe00 exec erase_part uboot_log write_part splloader spl.bin timeout 100000 write_part userdata userdata.bin reset

[Ranomez]

Oh my god! Thank you so much!
That info should really be added to the wiki though.