Bart, scaling by 100% doesn’t do anything. You need to scale up by x10 or x100.
SU fails at making faces on any outline whose smallest dimension is about 1mm (.04") or less. Follow Me produces many tiny faces extruding a curved profile along a curved path, and the more segments in the curve, the smaller the faces.
Coming from a mechanical design background as I do, the models I make are often of pretty small objects. What I generally do, therefore, is work in decimal feet and pretend it’s decimal inches. That gives me a x12 advantage from the outset. If necessary, I scale down the completed model to measure faithfully in inches.