I recently experimented with printing a Rogue Trader era Dreadnaught and thought I would show off the result. Once again, this was printed in FDM on my Bambu Lab A1 3d printer using a 0.4" nozzle.
I set the layer to 0.16mm layer height. You can see the layer lines on the model in the photos below. I've since realised that I get much better results on the 0.4" nozzle with a layer height of 0.08mm. Something I expected was too small a scale for a 0.4" nozzle but am pleasantly surprised to discover that it handles easily. So, I plan to make another print of the model to compare between the two.
Here the Dreadnaught is printed for the original 28mm scale. But I plan to use it for my 15mm 40K scale miniatures. I'm thinking of making it an Iron Man rogue AI model that has survived over 20 millennia and comes from the Dark Times of Technology. I have printed more "modern" 40K dreadnaughts for my Space Marines hence why I plan to use this fellow as a rogue AI. It's also going to feature in future adventures for my roleplaying group.