So I have Chineese N9 which was flashed with:
DFL61_HARMATTAN_40.2012.21-3.418.2_PR_418 (tag on SIM tray was 059J245, but real firmware checked with flasher, corresponding to DFL61... above tag: 059L5T6 = China Unicorn).

I was really unhappy to discover, that my new N9 from China (for backup of old beloved N9) was flashed with such a high variant.

NaviFirm+ shows, that only a few of branded firmwares could be used to flash my device:
T-Mobile Austria: variant 430 (059L6C3)
Telcel MX MX: variant 420 (059L449 spain)
Vietnam: variant 454

After a lot of reading on Maemo.org I discovered post about UbiBoot, which allow to use any kernel.

Ubiboot is installed now on China N9, and before I would invest my time, and perhaps do something stupid I would like to make sure, that my reasoning is correct:

With ubiboot,
- I have access in "maintenance mode" on N9 connected to Linux to all partitions.
- with flasher-3.5 I could extract firmware from eg. 059J1Z5, and copy all files to rootfs, to replace Chinese variant 418, and obtain N9 working with European 059J1Z5 version with variant 001???
- then I would need to flash "CMT only" from original 059L5T6 to be able to use GSM modem in Europe???

And in this way I would escape from "variant lockup" of my new Chinese N9??

Any suggestions and corrections of my assumptions highly appreciated :-).

If I am wrong I will go for flashing as described by VIBE a few posts earlier