Ten years ago I designed a frame for a Lotus Seven Replica. Today I tried to print this frame without any change (just scaled it down to match the bed of my Ultimaker). I also did not use any support.
The result is far from being ok, but it is better than I expected.
I used a layer-height of 0.15mm and 100% infill. Using support is a good idea...
Disclaimer:
This work by blecheimer is licensed under CC BY-NC-SA 4.0
You are not allowed to copy this model to other 3D printing websites without my permission.
The author marked this model as their own original creation. Imported from Thingiverse.