Luteal Phase (n.) 1.(MeSH)The period in the MENSTRUAL CYCLE that follows OVULATION, characterized by the development of CORPUS LUTEUM, increase in PROGESTERONE production by the OVARY and secretion by the glandular epithelium of the ENDOMETRIUM.
Auto detailing clay is similar to the stuff you played with as a kid, but the clay used for detailing is usually much more elastic, especially in the case of Pinnacle Ultra Poly Auto Detailing Clay Bar.
AS I DIYer, I've done isometric plumbing drawings based on dim memories of a mechanical drawing class in HS centuries ago. I found them very useful in visualizing how the parts go together. Have you tried tracing over isometric paper?