Yes, even if I could get the camera temp below 20C that would be greatly beneficial. I wonder if I could use the Orion / Canon cooler box and modify it for the Nikon? I need access to camera controls though. I trip the shutter with an IR remote manually but I need access to camera buttons to set this up. On the Nikon, to set the IR remote shutter you have to use 2 buttons at the same time and then it only remembers the settings for a minute or 2 unless it's being constantly used. Or as Justin says make my own. Next problem is I'm getting old and stupid now.
The CLS has something like 31% transmission of total light throughput. As such it likes long exposure times. The benefit is that it still passes 90+% of OIII and Ha so there is a huge contrast boost to nebula while subduing stars. The downside is camera noise increases in the longer subs.