Hi alastairstevenson,
Can you please elaborate more on how you do the davinci tweak? I have two DS-2CD2035-i (G0) from China running 5.4.0 (hacked-to-English). Successfully upgraded one of them to 5.4.41 (IPC_G0_CN_STD_5.4.41_170710.zip) with everything working and full ssh shell but it is now...