Might want to try this:
NokiaSoftwareUpdaterForRetail_4.3.2
Might be worth a try for the OP too.
I rolled back on my 1320 after a bootloop, and WDRT worked fine, after several attempts.
Have you tried the Nokia recovery software? It can even dead flash a device.
Maybe you should have read the term and agreements provided by microsoft for insider preview.might work nice and smooth for a lot of people, but it is still UNFINISHED software nin the less, so occasional bricking is to be expected. You cannot be mad at microsoft, only yourself if you didn't want to take chance you should have stayed on 8.1 until official realise.
That is neither constructive nor useful...
I know that technically you're right but you have to put yourself in his shoes and be compassionate. He tried a software to help MS develop it and his phone, which is not a cheap thing to replace, is now dead. He's angry and it's understandable no matter what he agreed on. Your post is like someone crossing the street, getting hit by a car and you going next to him and instead of helping him just saying "Maybe you should have looked both ways before crossing"
That is neither constructive nor useful...
I know that technically you're right but you have to put yourself in his shoes and be compassionate. He tried a software to help MS develop it and his phone, which is not a cheap thing to replace, is now dead. He's angry and it's understandable no matter what he agreed on. Your post is like someone crossing the street, getting hit by a car and you going next to him and instead of helping him just saying "Maybe you should have looked both ways before crossing"
The techs at Microsoft don't realize what
a pain it is to have to go back to 8.1 then load the build, it takes hours out of our day.
Technically, I think 8.1 is what screwed up your phone.
Sorry about the hassle, have you had any luck getting it to flash?