Sorry, it worked now. I deleted enough blocks, rebuilt the armory database on the new subset of blocks and then could create the BCH transaction again. This time it worked and I could send the transaction through blockdozer.com.

It was either my fault or something strange happened during copying the signed raw tx. Just make sure that you actually get a quite long hex value there.

Exactly.

It looks like BASE64 since it contains a '+' but it is not since it does not end with a '=' char.
It is 20 characters long.

Update:
It seems like that this 20 character long string is contained in the signed TXSIGCOLLECT data.
Could have been that something went wrong with copying stuff around in X11 and that it is my fault. I'm not sure though. Normally I'm not that stupid.

Is there a way to get the raw tx from the signed TXSIGCOLLECT data?

I think there was a button like "copy raw tx to clipboard" or something like that.

Meh, I'm pretty sure that I turned RBL off when I created the transaction :/

The error message is quite generic unfortunately.
Blockdozer just says:

An error occured:
TX decode failed. Code:-22

Please help!

I successfully sent my BTC from Armory 0.96.3-beta.

Before I did that I created a signed tx to transfer my BCH. I signed with the bitcoin cash signer and disabled RBL as described in this thread here.
I saved both the unsigned TXSIGCOLLECT data and the signed TXSIGCOLLECT data. I also saved the raw tx.

Passing the raw tx to http://blockdozer.com/insight/tx/send however does not work!
Also it seems like the raw tx is not even a hex. It contains a "+" character for example.
I also tried to convert this string to hex (both from ASCII and BASE64) and submit the result which also did not work.

Any help is much appreciated!
In particular I'm looking for a way to get a valid transaction from the data I have.