Hacking Partial Downgrade N3DS 9.8 - 9.2 - HELP

[cherup]

Hi, I have bought a new 3DS XL with Firmware 9.8. As I want to use the Gateway Modul I tried to downgrade it to the 9.2 version (EU Version).
I was using the Gateway Time Machine for the downgrade (probably not the best idea).

After the downgrade the device is booting and showing 9.2 Firmware - but Gateway Laucher alsways ends in a black screen.

After some more investigations it seems that my downgrade was not completed which is also shown in the result of downgrade check:

[MISMATCHED VERSIONS]

TitleID Vers: Expected Installed Description

0004013000003802 06144 08198 act system-module
0004013000003702 05120 06148 RO system-module
0004013000003502 06147 07168 Notifications system-module
0004003020009d02 00010 02051 New3DS Internet Browser
000400300000f602 02050 03072 Miiverse memolib
000400300000d602 08200 11264 mint (eShop applet)
000400300000c502 05128 06145 error applet
0004013820000002 17120 20262 New3DS NATIVE_FIRM
0004013020004202 01025 02052 New3DS qtm system-module
0004013020004002 01024 04102 New3DS nfc system-module
0004013020002202 10240 11264 New3DS PTM system-module
0004013020001e02 04096 05121 New3DS i2c system-module
0004013020001c02 10243 12294 New3DS GSP system-module
0004013020001602 09218 10242 New3DS Camera system-module
0004013000008002 14336 17408 NS system-module
0004013000003302 08192 10246 IR system-module
0004013000002f02 07168 08198 SSL system-module
0004013000002c02 10249 12296 NIM system-module
0004013000002902 12288 13318 HTTP system-module
0004013000002802 06145 07174 Download Play system-module
0004013000002402 08192 09216 AC system-module
0004013000001d02 09216 10240 HID system-module
0004013000001b02 02048 03073 GPIO system-module
0004013000001a02 05120 06145 DSP system-module
0004013000001702 12290 14342 Config system-module


[EXTRA TITLES]

TitleID Vers. Description

000400300000b902 01031 amiibo Settings


[MISSING TITLES]

TitleID Vers. Description

So I have identified the missing CIA Files and placed them into the 'update' folder og my SD card.
I have installed PlaiSysUpdater to run downgrade with the missing CIA files again.

Bit once I start downgrade the 3DS end in an error screen (An error has occured...) and I have to reboot. Luckily the 3DS is still working, but now I do not know how to proceed here best.

Hopefully someone can give me some good tips, how to deal in this situation...