3D printed DA/Mistral style double hose boxes with an integrated Healthways type mushroom exhaust made for the Titan II first stage by James J. I just assembled it today, and tried it out on a tank. It works like it should!
IMG_5608 by Vancetp, on Flickr
IMG_5607 by Vancetp, on Flickr
IMG_5604 by Vancetp, on Flickr
The exhaust needs some tinkering with still since the spokes are pretty delicate. The coolest part of this is that the hole for the first stage can be easily set up for lots of different 1st stages!