One more after finishing installation of the fans, wiring, and jack. Exhaust ports are around the circumference of the rear plate. The empty fork mounting holes act as exhaust ports as well. The power jack is at the bottom of the rear plate below the bottom fan.
The fans are silent for all intents and purposes. No vibration either, although magnification wasn't pushed tonight with the jet stream sitting overhead. It was bitter cold at 15* F. The telescope cooled enough for stable images after about 50 minutes with the fans running after coming from a heated garage, which is around 50* F. It got even better over the second hour.
One attribute stands out after a few sessions now. The sky is an absolute pitch black with very little scatter even around Jupiter.
Even cleaned and installed what turned out to be a very impressive 40mm finderscope with helical focuser and illuminator port (although my Rigel Pulseguide did not fit). I believe I'll have to obtain an illuminator with 10mm x .75 thread pitch.