This might be a dumb question but what about _compliant_ joints that expand and contract when warmed up by the sun? You can have any expansion multiplied such t

This might be a dumb question but what about _compliant_ joints that expand and contract when warmed up by the sun? You can have any expansion multiplied such that minor changes in length are sufficient to track the sun in a meaningful manner. No mechanical wear and tear and no wasted space.