8:14 PM, Thursday December 8th 2022
The lines that go through the middle of the sausage are the minor axes (that's the plural form of 'axis', apparently), yes, and they're supposed to be curved, not straight, but not waves. A wave is just a curve that turns more than once. The one sausage I linked is the only one where you've done a wave instead of a curve, so don't worry that much about it.
And by consistent width, I refer to the shape of the sausage itself, not to the ellipses. The width/degree of your ellipses is fine. What i mean is that your sausages should basically be spheres connected by tubes of consistent width, as detailed here.