It is easy to solve it. Look at the QHY11 Center/Tilt adapter. It has two air sockets. I just connected the pumps to them. I made a 3rd socket so I could pump air from 3 directions. Last night the CCD was at -25 with no issues. The roof of the observatory was dripping lots of water from the dew. The camera was fine.
The pumps costs about $15 each.
Regards,
Enrique
http://www.qhyccd.com/images/adjust%...015%2016_2.JPG