I think I might not have been very clear on what I’m trying to achieve possibly 
What I want to do is have portamento, but only on tied notes. Like a 303 sequencer can do. This is only something that can be done with CV afaik.
I tried to use midi -> 0-coast. And I can set it to legato, portamento=on CC65 + portamento time CC5, but that will just glide every note into the next.
I want the glide to happen only with overlapping / tied notes. As I said the Cirklon can do this. I found no reference in the manual to this, so I’m keeping my fingers crossed for v3 