@SwallowFeather This could help. Here's Ichazo's version on 3: https://www.personalitycafe.com/type...-type-3-a.html
Pushing yourself so hard that you damaged your hand tendons sounds like 3 and similar to what Icazo calls Ego-go: Hyperactivity, motivation and drive is the primary message of this ego. This is an ego that wills one to be in perpetual motion and to always be moving in order to be active towards whatever it is that we need to be efficient in.
SX is an instinct. SX = sexual, intimate, one-to-one, transmitting
SP = self-preservation
SO = social, navigating
More information on instincts: