Printed this out at 255% scale so I could mount it on my shed and see it from a distance.. Love the design, especially the detail on the tail fin. The only issue I have is that it does not balance on the rotational axis. When I scaled it up 255%, the model ends up being about 32cm long from tip to tail and the head end is 25mm in diameter. I should be able to drill a hole in the bottom of the head to add weight for balance. I designed a bearing housing so I could mount it on top of a length of 1/2" PVC pipe. I'll post this as a make later.