Which version of flashfix did you use?
Were there any warnings when you patched the firmware executables?
I used flashfix 18.104.22.168 and got the "size out of range" warning on 7D13, but patched it anyway.
If the patched or unpatched file is wrong, you will get an error if you try to flash it... IT WON"T LET YOU!
Tried it on a patched 7P5A and unpatched and it flopped, tried it on 7D14 patched and unpatched, and it flopped
with the error that it was wrong.
Unpatched 7D13 did not work but patched, it did and then I ran an UNPATCHED 7D14 and it worked.
The only scare you may get is that after the firmware update, it verifies but won't quit on it's own.
(it says "inquiring" all the way to 100%) then it hangs but if you reboot, it shows as updated.
DO NOT REBOOT UNTIL IT SAYS %100 PERCENT ON THE VERIFY STAGE!
I've been using the updated (7D14) firmware for a while now with no ill effects and no coasters.
You DO have to use the DELL firmware though... at least it's as far as I've gotten.
If anyone can get the 7P5A to go, let us know??