I cannot send you any log because the tablet doesn't boot so I don't know how to make a log in that case.
I will describe as well as I can.
I have installed the rom on my SGP611 with all your walkthrough, and the result is the same.
The rom doesn't boot, when I disconnected it from the PC it vibrated one and nothing more, when I connected back to the PC it connected according to flashtool in "flash mode".
That it was happened with my Windy, I will read a little bit to find out a manner to do a proper log.
Thanks for you work
PS: sorry if I sounded rough but I am still learning English. And don't have any problem to be a tester