The aluminum plate is the plate with the holes to bolt down the propeller. I just thought that it would be nice to glue the cone to it or print it right to the plate. Just thought it would look cool. Instead of a spinner. But you are correct if you made a recess in the bottom of the plastic cone that would even look better and also have a better gluing surface top and sides.Why the aluminum plate? It wouldn’t fuse to it if that’s what you are asking. But could integrate a recess for the plate
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Trying to make a tray for an A123 battery pack. Took me a few hours to create a 3D model. After lots of dimensions and thoughts.... ideally it will be screwed down through the four bolts, and then one Velcro strap to hold the battery in place with room for foam and Velcro.
About an hour and a half print... we shall see if it works.... stay tuned!
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You have show us what you printed picture is a thousand words.I recently got back into N scale trains, been going nuts printing buildings and stuff for the layout