What I did: 1. Made (from black PLA), 2 blackout rings (this is _not_ the same as the assembly tooling ring I've published for the same model) to adhere to the front of the Ramjet cones. (I used epoxy). 2. Made (from White PLA), filled and painted 2 fake "fairing" fronts for the ramjet nacelles. I used Cyanoacrylate Adhesive (CA, SuperGlue) to adhere these to the blackout rings. DO NOT paint the backs of these fairings - you need to glue plastic-to-plastic, not plastic-to-paint. 3. Made (from Grey ABS), did not fill, two "nozzle" parts, one for each of two nacelles. I measured the length of the visible part, from the nozzle outlet to the "shoulder" of the nozzle, and cut away as much ramjet nacelle body tube as the visible portion of the nozzle measured. This keeps the tube+nozzle the same length as the original tube-without-nozzle. To attach the nozzles, (DRY FIT THIS WITHOUT ADHESIVE FIRST), I first lined the rear of the ramjet nacelles with blue painters' tape through 360 degrees. I then (dry-test-fit and) adhered the nozzle with a little epoxy to the blue painters' tape. This way, if I damage a nozzle, I can print a replacement, destroy the broken one in place to get to the blue tape, and remove the blue tape from the ramjet, so I can install the replacement without a lot of rocket surgery. Note that while I tried to get my BOMARC pretty authentic with Canadian dress, the red fairings and ramjet inlets are not accurate with any deployment I can find a picture of. There were some red "transit covers" in a few pictures, and I got confused as to what they were.