Child blueprints: Can't modify inherited components?

When I check the SpringArms length it’s reflecting what I set it to, but the SpringArm doesn’t actually extend.

Ended up rigging a different method to accomplish what I needed without the SpringArm, but there is a chance I’ll need the SpringArm down the road.

Could this have anything to do with the SpringArm being the root component?

Also, you didn’t mention if your test was successful?