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Thanks! I've printed out one at ~85% scale at 0.15 layer height. It's going to be longer than a typical Trackmaster car, so it'll be interesting to see how that works. I just watched the video to see how you did the door handles...are those glued in? I love the detail but I'm skeptical that those would be toddler resistant. :) My bowden setup has some stringiness between the gaps, so it'd probably have been better (for me) to have filled those in and only leave an impression of the edges.

I assume the the filler is for smoothing the 3d printing layer ridges? How does that compare to using XTC-3D or similar resin to avoid the need to sand it? I mean the roof is one thing but it's very difficult/tedious to sand the detailed sides of these train cars.