So I've been ploughing on and I'm finishing some additional architectural changes that affect all cameras. I still want some additional testing around stability - such as performing 12 hours of exposures.
The 383L is now setpointing and reporting temps, images with binning, subframe from 0.000001 to minutes are now working nicely. In short - the 383L is very usable (read there's just the beta usage trials on this) :D I've also pinged ATIK about an idea for this camera and I'm hoping that they'll implement it. I still have "overlapped" exposures to complete but that's progressing.
This seems happy with repeated exposures atm.
The Titan is running, naturally it cools uncontrolled, currently just battling this due to the architectural change (worked before but there's something that's not happy).
The 4000 carcass I have has allowed progress on this. Ultimately I need to put some additional time into this (not having a sensor means I can't see if the resulting image is correct).