This is of a Groovy classic VW Beetle design auto and is a continuance of my cookie cutter chain.
Since this is really you are going to be applying pressure to cut via the biscuit dough and a cutting thing I propose using no less than 40% infill, and extremely 50%-75% might be needed in case you possess the stuff that is extra useful. If using 40% infill make use of the honeycomb layout as it's the most powerful with the smallest number of substance (Bees have known this since the start of time).
I added a fixed version but in reality the first had nothing wrong with it but when saving to the STL format it has seemingly brought in minor problems (nurbs to triangles). Essentially wonkers is gone by the STL format with minor problems while being interpreted from nurbs to triangles any high definition versions have minor problems.