I did
some tests here (in RGBA-8bit) with Reroute, and Alpha
Channel. It seems to work correctly. It is time
consuming, for me, to post here the
screencast/screenshot of the tests, but if you think it
can be useful tell me.
It may be (surely) that Cin-CV and Cin-GG work slightly
differently. I remember that, when you are using Title
effect, the black colour is meant to be the alpha
channel (more or less).
It may be that not everything Cin-CV is able to do can
be reproduced in Cin-GG,... and vice versa.