unbrick NSA310 and set up environement (no replies)

Hi,

From a wrong flashing process I was able to unbrick my NSA310 (with another Linux box, loading uboot.kwb via kwboot, UART module cable)

I have the console of NSA310> and I am able to load the uboot.kwb, but unable to set up the environment properly (using these files: uboot.2017.07-tld-1.nsa310.mtd0.kwb uboot.kwb
uboot.2016.05-tld-1.environment.img uboot.img )

is that possible to completely clear the environment from nand and setup the proper environment?
I only access to preboot NSA310> console now.

I have tried to load environment image following this guide, but after loading environment image and doing a reset, my NAS is 'bricked' again, no response (I need to do a kwboot image transfer again via UART) just all the front LEDs are red.

thanks in advance
Peter