Wow, that looks really great! (screenshot attached)

I guess you could use the ST20 size for a full SLS model also, would be pretty impressive.

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I did that a few years back ,with a paper nose cone of my own design. Now I can replace that paper one with something more stout,

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Wow, that is an impressive rocket. Do you use removable fins for flight, or is that display only?

Removable fins shared between 3 different rockets.

Here is the initial dry-fit of parts for the Centuri Screaming Eagle with the printed fin can with SEMROC body tubes/balsa nose cone. The nose cone has a few coats of sanding sealer and a couple of coats of Rusto2X Gloss Apple Red, sanded and ready for final top coats. You can see how the engine tube extends a tad bit too far out the bottom of the fin can, but there should be enough margin where I can trim that off and mount the engine thrust ring a little higher in the tube to compensate for that. Body tube is naturally white, I am on the fence about painting white over it, or leaving it unpainted. Still have to do more sanding to the inside of the fin can to have enough tolerance to get the engine hook to fit in there with the engine mount tube.

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Redrawing the Screaming Eagle decals in Inkscape. I have some chrome peel and stick that I will use and try to print these on ink-jet decal paper and apply them on top of the chrome sticker. Hopefully that will look close enough to the original. (screen grab of Inkscape drawing)

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That's a nice looking Screaming Eagle

__________________
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I probably should have started a new build thread rather than digress from the original 3D printing subject, there are lots of other cool models available for printing in that rocket parts collection of 3D models. The Screaming Eagle is easy enough to clone using standard body tubes and balsa fins, but really cool to have this printable plastic fin can 3D model to match the construction of the original.

I'm sure there are some BAR's out there who would like to clone the ESTES 1974 Explorer, so here is my take on the nosecone. You can download it here -

https://www.thingiverse.com/thing:2876174

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And now here is this one also 10 EST 2015 StrikeFighter

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