Doepfer

I'm considering adding an A-135 VC Mixer to my system.
Has anyone used these in combination with the A-144 Morphing Controller or
by itself? 
Is it really worth the space it takes up, and what exactly does the A-144
add?
Is it possible to "crossfade" different signals, and do this voltage
controlled, without the A-144?

I guess it's either the VC Mixer, or I'm adding an A-134 VC Panner to my
system, to crossfade/vc mix between two channels instead of four...

Also, my apologies to Mr. Stinchcombe for not replying to his questions and
remarks about doubling frequencies with a Ring Modulator. It works okay with
lower frequencies, but I still can't turn 8kHz into 16kHz with this setup
(which is kind of what I was looking to do, extending the limited range of
the A-110 with the A-114).

Many thanks!

Mdimm